2023-12-31-accounts

British Ornitholo ists, Union gdvan¢ing Om￿h￿OI0gY Annual Report & Accounts birds | people | science BOJ.ORG.UK IBIS.AC.UK @IBISJOURNAL IBISJOURNAL IBISJOURNAL 2023

BOU Annu31 Report & Account5 | 20231 2 BOU President's statement CONTENTS Dr Graeme Buchanan It is noii, a J'ear since I beLame Presideni of Ihe British Orniiholo£isis Lliiion. Unfortunately. I I4'.as uiiable LO attend the AGIq and £pring conferenie in 2023 but l am very muLh looking forward io being in NottiiiRliani this ￿ear. In the p3St year. BOL has ettled intn ne￿. ￿'ay£ nf ii'nrking, alter Coi.-id. and Lpil<i 11.'<ilker fiJllN' p%tl£ blis11?d as our exLellent COO. This year has also been a period ol learning lor me., Ilaving prei'iDusli' cuiitributed tu Meetings Committee dnd Sdt ds dn Urdin'wa!s. B). my reLkunin¥, the spedkers Ldme IrDm 19 Luulltries. refleLtin¥ the glubdl redLh ul BOL. Engagement Committee IBIS Management Committee 13 Meetings Committee Grants Committee Records Committee 27 The auiumn also saw a special eNening of talks by those with PhD Sludentships funded b! the Juhn dnd Vdt M drhdtn legdL!. BOU hds ddtninistered this legdLy bi, giving tuiiding ffjr PhD %tudent% ba.%ed in ConimDni¥ealih Countrie￿ to Etud}' Spheiiiscilorin clnd Procellariilorin seabirds Ipeiiguins and petrelsl. These groups formed Lhe Lore re£earch inieresl of John 11 arham. 'l-he evening leaiured a diverse range nf talk% frntn around the globe, coveriiig Rniiiid Island petrel%, cre%ted pengiiins and Iking Penguins. Il-e ￿'18b the nir)sr reLent recipient, Jnhii l.8maris. lyell a8 he siaris his Phll rescai-lh on Bcck's Pelrcls. Onc of the lirsL tasks lor him M'ill be finding the breeding areas of this poorly kno￿ n species. Membership 29 Financial Review 29 Responsibilitie5 of Trustee5 32 Auditorf5 Report 33 Annual a¢¢ounts for 2023 37 IQFL. L'xpanded thc, BOLT'S Managemc'nt Gruup. frum PrLsideni. £LcfLiarb' IN.Idrk Edtlinl, Tredsurer (Grdhdm AppletLiiiI dnd COO, ii".elcumin&F biJth BOL Vice Presidents IEmma Cunninghani and Richard Bradburi'l, This l- across the group. This S'ear Ihe expdnded 1.ldndxe￿enI Group hds underidkeii d review of BOU'S membership, conferences, and direction and mi%sion. BOU'S niission statemeni i¥a% la%L reviewed in 2010 and making sure Ihal FSOLI is going in the right direction and maintaiiiing suppurl is essenlial. Coi'id Lhanged mdlll, Ihings dnd. while dreas hai'e relurned tD busines% a8 u%ual, nur m.ays ol workinE and phy8ical 3ttendance at event8 ivill likel). h<ll.-e changed. 15ee it my£ell as l Th'ork more from home and h<ive the option of ,iitending ￿'OrkShopS and conlerenLes online rclLher than in person. The changes we

BOU Annu31 Report & Account5 | 20231 3 BOU have seen could hai-.e impliLation£ lor ROLT membership and conlerenLes. Organising and running our Lonfercnces are major parts ol Th-hai BOU docs so ive hai'e taken this uppJrtunitN' tJ IiJuk dt both uf these dreas and tu rellect upun the BOU'S direction and mission. ADMINISTRATION DETAILS The membersliiD revie￿, led b! Einn)d Ciiiinin%ham. Loneluded Ihai membership hds beeli stable post ?a19. This i4-a£ reassurinR aiid indicaLed that Ilie beneliL% assnciated ￿.1[11 BOU membersliip remain relevant Ir) nrnithnlngisis. During the review, ￿'e identilied dn oppurluniiy. io understand Ihe LLTrmpusiliun ul uur member8hip in in¢)re detail, helpinE e%tablish trend% and pdtterns. Con%equentlJ', M'e are discussing cnllecting a small aniouni of extra information about menibers to inform luture reviews. This M'ill. ubk'iuiisly. dll bg GDPR Lumplianl. The rek'igw (Jl cfjnlerence8, led by Cat Morri%Dn and II3rk Eaton, coiicluded th31 our coiilerence aini ' to support tlie oriijrliological con7niuEiitJ' aroyiid ori?Ithological science Other organisaiions and Lonferenees cover aspects ol Ivhat BOII does bui birds remain ai the centre ol BIIL 3Ctii'ities. Ba%ed on the 3%se%smeni, conference5 Vvill remdin themp.d. and Riyp an Dppnrrunit￿ fTrr Trrniihnln&ical scie.ntisi£ tD Eet toRethpr. tn share thcir ￿'ork and hear about Ihe u'ork ol OLhers. Conferences ll.ill bc in pcrson in spring dnd likel}. tnixed lunline dndlor in person) iii aututnn. It li-ds recugnised in the reiiie nf n]ember8hip, conferences, and BOLI directioii in general that birds lie at the heart of the Union. BRITISH ORNITHOLOGISTS. UNION Founded. 858 Reg15tered 3s a Ch3rity-. England and Wales, no. 249877 Scotl3nd. no. SC044850 Address PO 8ox 79, Pembroke SA72 9AX, UK Tel." [phone] Email.. [e-mail] Wob-. bou.org.uk I Ibis ac.uk As at 31 December 2023 BOU Staff Chief Operationsofficer Dr Leila K. Walker These revie￿"￿ led iiit() a brodder revie￿. ()1 Bl)L's directi()n by d sub%et of members of Council. led bs, l.eila MTalker, Richic rd Rradburs, and Inysell. The mission siateinent up to 2023, has bee11 'The Brilish Orniihologists Uiiion M ill promoie undersianding dnd Lfjnseri.-ali()n ()f the i%-.orld's birds, ddN'dnce nrnith()l()g}' within Ihe siientilil communitN' and promote scientific nrnitholog}' to the ￿-.1der b]rd￿'a[chIng public. loutnal & offi￿ Manager Mr5 Angelo F Langford Council Officers President A w'orking grouD considered this mission statement in the context of the conferenee and mernbership revieI4.' Outconies. The group agreed that ROU was currentl! meeting its charitlc ble objects ￿.-hich are 'the adi'ancement of the science ol on1ilholo2 J bill. ￿.hIle Ihe mission s(aien)èni ￿.aS broadl%' appropriaie, il needèd onie revisi0113 to reflect our curreiit and desired investmeiit iii aCtI￿ltIes. Tlie lie￿. versioii. as agi-ecd b} Council. noiir sa}s'. Dr Graenie Buchanan Vice p￿Idents Prof Emma Curbningham Dr Richard 8r3dbury Honorarysecretary Dr Mark E3lon HonoraryTreasurer Mr Graham F. Appleton Ordinary Members of Council "The Briri.sh CJrJ7lthijl￿lll.5ÈS, I,'iiJuTr HiJJprL)dYELJrg urTrithulcJgEc3J.fCJenLE &Lrosb ihe iriiern&tionc71 sLientifie communiii.. bupport ihL indiF'idu&ls whu Lunii-lbule l(J rhdl sL'ignLe. d￿d¥1-￿￿' Eindvisfd￿dIn¥ vf thdl sLi&J2C Dr Sonya Clegg ICh31r, Grants Committee), Dr lark Eddowe5. Dr Tom Finch Ichair. EDgagemeni Commilteel, Dr Cat Hor5wiII, Dr Rosernarie Kentie (Chair, IBIS Managernenl CommiltoÈl. Dr Alex Lees (Chair, Records These edits intend io.. lil rediice the lociis on conseri-.ation. which 1£ jii£i one aspect of BOU dLtivily', lill retdin the fuLus oli SLieniifiL orniiholog J., (jill liighlight the impnrtant rnle nl BOU in suppnrting the iareers nl nrnithnlDgicg1 researihers. and., liyl Llarifs, that BOU'S audiences are i4-Ider Ihan just the birdi¥aiching public. for instdnLg iniluding industry diid g(Ji.erninent. Morrison Ichair, Meetings Commitieel, Dr StU3rt Sh3rp and Dr Lucy Wright (Chair, Aw3rds NominaLiOn5 Commitieel.

BOU Annu31 Report & Account5 | 20231 4 BOU This ne￿-. mission sialement very much promote.s the charitable objeciiies of ROU. The adi'anLcmenl of Ihe SLiencc ol orniihology lies l-ight at thc core ol i4.-hai BOU do)es, thruugh IBIS, cunferences. dnd 5Q)Cldl medid. This ddi'dncemenl CL)i'ers dll ,Ispecis ol ornithologiciil Science￿ lind that iaxa-specilic locus is a strength ol ROI,. The reiTiew has beeii cl valuable exercise lor BOL l.lic llclgeinent Group one that we aiin lu rgpeal everv years - lu ¥nsure BOU Loniinugs to advance oriiiiho)IukiLal science as ef(ectivelJ' as po£sible. ADMINISTRATION DETAILS CONTI Trustees The following Individuals sewed as Trustee5 I louk lurward lo ilrurking l4.iih dll in BOU lur the nexi Ihree years lo deli￿èr Ihis missi()n. this annual repori and 8ccounts-. Mr Gr3h3m F. Appleton, Dr Rich3rd 8radbury, Dr Graome Buchanan, Dr Sonya Cle￿, Prof Emma Cunningham, Dr Mark Eaton. Dr Mark EddowÈs, Dr Tom Finth, ProfTony Fox. Dr Cat Horswill. Dr Rosemorie Kentie, Dr Alex Lees Structure, Governance & Management Catriona Morrison (Chair, Me&tinRs Cornmitteel. Dr StU3ri Sh3rp and Dr Luiy Wrighl. The Brilish Orniihologisls Union is an uninLorporated LharilS'. no. 249877 (England & IWdles1 dnd SL044¥ofO1SLutldndl. Trustees of the charity for pari of rhe year c(Jvered bythis annual report and 3ccounts'. Dr Francis DaunL ProfTony Foi Drlames Gilroy. Dr Rosemary Trevely3n and Profluliei Vickery. The objecL ol the BOU is the promotion ol the science ol orniiholog>. Irb goiTerning doLumeni is the Riiles adopted al the Annual General Nleeting in )010, ai)d last updated bi. Council in Jul! 2020. Under the rules, the governing body, the Qouncil of the Ilnion, is responsible lor the running ol the Union s business. siipported b31 IIS staff. CounLII ma J. dèlègaie liinLtiong io siandin£ or ad hoe eommitièes Ihal reporl 10 Council. The Union s Coiincil retains overall responsibility tor matters so deleRated. Editorial positions AL 31 December 2023 the following editorial PQSitlQn5 were held The BOU has six standing Lommittees.. the ATh'ards Nominations Commiltee. the En£dRetnent Cummittee, tlie Grdnts Committee, the IBI% N.'landKTen]ent Con]niittee, the Meetings Conimittee and the Records Committee. IBIS Editors Dr Rauri 8owie Elected metnbers of Council are Trustees of the chdrity. Nllenibers of Coiincil dre recruiLed from within the ornithological cornmunii}'. Th'here pos£ible, Council members ii.ill have served on nne fir more nf the F40U's sianding cnmniiitees prinr io no)mindtiun lur eleltiun tu CuiiiiLil. -l-huse stdnding lur eleltion lu BOU CuunLiI d5 dn incoming chair nl a %t3nding coinmittee ￿-11[ hai.-e serb'ed fnr at lea￿t ti¥n }-ear8 nn the respeLriNe committee. On eleLiion. ne￿, CounLII members are proi'ided ￿"1th relei-.ani Lnion duLumgnls lu help Idtnilidrise them with Lurrent Uniun dLtii'itieb dnd tu prui'ide infDrmation on the dutie.s and respL)n.sibilities of being a Trll￿tee lif the Lninn. Prof Rebecco KiThb311 Dr Ruodi Nagor Profleremy Wi150n Blog Editor I nvestment Trustees The following indwidu315 5eNed as Invesimeni Trustees for the Union during the period of thi5 report and accoun￿.. Mr Nigell. Crocker, Mr Richard Price and Mr Stephenl. Rum5ey. Council eontiniiall> reiie¥¥s the risks 10 ii.hich the Uiiion is exposed and is satisfied that, as far as is practlC3ble, it ha% taken 3ppropriate steps to mitl%3te any risk. The Ilnion employs tTho lull-time siafl ￿-hO work from Iheir resDeciive home offices. Siafl salaries at-e reviem-ed annually, as part ol our stalf appraisal process, conducted by the Pre8ident and Hnnnrar}- £ecretarN'. Pay is nnrmally adju8ted in line i¥ith

BOU Annu31 Report & Account5 | 20231 5 BOU inflation ICPIHI and rhere is an option Lo aM."ard an unconsolidated performance- based bonus, in eiLCPtional circumsianLcs. ADMINISTRATION DETAILS LONTI. Objectives & Activities Bankers Tho Union holds accoun￿ wilh Ihe following banks Mission statement The Britlsli Urnithnlngists Uninn ￿.111 proninte Trrnithnlogic31 science acrnss the internarional scieiitiliL Lommunity, suppori the individuals iirlio contribute io Ihat SLienLe, and gruw understanding LTr1 thdf SLi¥nLe dmung a ￿'Ider Lvtnmunitb.. -l-he BOU mission Vvill be achieved by the follow.ing mean5'. CAF &nk Ltd 25 King5 Hill, West Malling. Kent ME19 4IQ Natsvesr Bank plc PO Box 6037, Brompton Road, London SW131XI PublishinE IBIS as a leading international journal ol DrnichologiLal science. Orgdnising d pfL)grdmme of meetiiigs dnd Lonferences. Awarding grants and bursaries lor orniiholngical research. Eneoiiraging liaison bec￿'Cert those aciik'ely c'ngaEed in orniihological researLh. Pr()vidiiig d reprebgnidlik'e b()dy ol lh¥ SLientiliL L()tnmiinilb', dble in pr(Ii'ide 0rnithnln￿iCal infnrmation and adi.-icp. to Rove.rntne.nt and fjther policy makp.rs. Maintaining and publishing the official list ol birds recorded in Briiain- 'I'he Brilish Lisi. 50licitor La￿or Ranger House, Walnut Tree C105e. Guildford, Sutrey GU1 4UL Accountant & Auditor Council activities At our AGM iii .Ipril. held diirin% BOL2023 'an. The Unions accouniani and auditor are. Azets Auditservices We5tPOlnL Lynch Wood. Peterborough, Cambridgeshire. PE2 bFZ We were delighied that Prol Jane Reid Iunii'ersiiy of Aberdeen. UK & Norii'egian Lniversilj. ol %cienLè and TeLhnolog>'l aeceDled oiir inviiaiion io deliver Ihe Ioih Allred ￿e￿-t￿n Lecture at BOL202.'1 IpaEp 61. 11 e ii.-ere eouall}- deliEIILed to aiiard the 2023 Godman-salvin Prize to Prof Cao Lei Ichincse Acic (leni>' ol SLicnccsl. who aecepi¥d ihe Prize ai ihe 20ih Goose Specialist Group N.leeting in Mongolia Ipage 61, and to aw'ard the 2023 Jaiiet Kear Union Nledal to Steve Dudley, who accepted the medal ai BOL2023 Ipage 71. Elected metnbers of Council, d5 Trustees of the chariti., coiilirm th<lt theN' hdve referred LO the guidance contained in the Charity Commission's general guidaiice on public benclit whcn reNiew'ing objeciives and activities. Activities in Scotland -I'he BOU is dn uninLurpordted Lhdrily registered in £LUtldnd l.%C0448501. well ds hal'ing niember% in £cotland. at the time ol this report, five Df Dur Trustees. Dr Grcieme Buchc1nan. Prof F.mma Cunningham. Dr Tom Finch, Dr Julie N..liller aiid Dr

BOU Annu31 Report & Account5 | 20231 6 BOU Catriona Morrison, and tM"o ol our journal editors. F)r RLJdoll Nager and Prof Jerems, Wilson, also resided thei-e. ALFRED NE￿ON LECTURE Achievements & Performance Reports on our activiiies from Ihe BOU Office and Standing Committees The BOU Office Staff During Ihe l'ear. thè BOU emplJyed two huine-bdsed sldfl tnetnbers within the BOU Qflice.. .4nge13 LangfDrd l.lournal & Office Nqanagerl and Lei13 I1'31ker (Chief Operations Ollicerl. Proflane Reid delivered the 1 Oth Al.'red Newrton Lecture at ROU2023. lanes Alfrod Newton Locture, entitled IrFiegraiirpgse17sonolmDvements Inio evolulionoryecology, consid&red th& various Office duties Thg BOU Oflite is responsible f()r thè effei live running ol the BOU. managed bs, Ihe Chiel Operations Officer and overseen b}, Council dnd the Lnion s sldnding committees. dynamics In the context of dramatic environmental variation. The BOU Oflite s kev resDonsibilities arè". to underLake the daj. 10 daj. running of Ihe BOU., to supporL BOU Council and its commiiiees. implementing miieh ol the work arisinx Irorn Ihetn, sD&eiliLall)', 4.-orkinE R4-ith the IBI.f l.lanaEement Committee. manaEe non-editorial, business and markciinE ol the Union s joiirncil. IBIS., working ￿-1[h the Meelings Commiiieè. organise BOU conlerènLes and tneetinkFS', .-orking Th-ith the Eng8gcmcnt Committcc. devclop and deliver engagcment iniliclLii'es including eou1c lit! and diversiiy Items.. orkinx ￿-1th the Gr3nts Con]tniitee, manage the Union s Stnall Grants and Career Development Rursary schemes, the John & Pai Il'arham SLudentships and Ihc Brcnda & Tons, Gibbs .4i¥ards'. wurking M ith tlie Hecords Lointniitee, tndndge the British List and dSSOLldted GODMAN-SALVIN PRIZE ce BRITI 'HOLOGIST LVIN ME Prof Qo Lel recoiveo Lhe Godman-salvin Specialist Group Meeting, Ulaanbaatar, 1oTrgolia In August 2023. The aWBrd reio8ni5e5 Lei5 extraordinary -.orking with Ihc Awards Nominations Committcc 10 dci.-elop and deliyer Lhdnges lu Dur noinindtiuns pfDLesses dnd dl4-drds Lriterid., 'orking ivitli the Honorar>' Ti"easurer, to niaintain accounts and budgets and the preparcllion of annucll accounis and annual lorecasis.. Nvorking wilh Ihe IBIS Edilorial Tèain, 10 oiersee and manage the manusLripl proces% and flo￿. for IBI%, and to over%ee marketinE of tlie journal., to oi'ersee the busines% and coniracLual sides ol IBIS., to seri'iLe ihe BOL membership.. to dei".elop and nian3Ke tlie BOL'S ￿eb content., ti) dei.-eli)p and manage the BflL'￿ si)ciJl media activity.. to underiake rouiine administration.. to indnalle BOU Sdles, slo)ck dnd siurdge facility.. monitoring programmes that have brokeD new round In ornithologgand movemeit ecology. conservation networks across cultural divides

BOU Annu31 Report & Account5 | 20231 7 BOU to handle general enquiries. press and publicit>'. JANET KEAR UNION MEDAL In ddditilin 10 working ii-ilh the Union s I'driuus cutnmittees (see indii.idudl cumtnittee reports beloivl Ihe ROL Office undertook Ihe activiiies outlined belo￿-. Website BQU.3RG LK In 2023, the BOU webslte reLeived 220,287 Pdge VIE￿..￿1232,a44 in 2022. -0%), representinK g.5,584 user% 1100,CO i in 2022.. -4%). Table 1.. Top10 most vlewed areas of the BOU webslte by number of pa8e vlews120231. Percentag change with 2022 Indicaied in brackets. Sterfe Dudley received Ihe JOITet.<ear Union Med31 ai ROU2023. The award recognises sievgs outstanding service to Ihe BOU, and his remarkable contribution lo Ihe community thai BOU 5erve5, from h13 BPPOintmeni 35 BOU Admin15tr310r In 1997 to his retirement as BOU Chief Operations Officer In 2022. 26,817 6. Small Research Grants 3,780 2. Home pa8e 12,942 7. Member login 3,744 UDf8U 10,003 8. BOU2024 ljrbuo bird5 3.142 INA) 4 Conferences & meetings lconferen￿.￿r￿.MeeII 5,983 9. #iheBOUblog 2,801 1.23%) rDI 5 BOUs(123 Globolfyivo 5,555 INAI 10. BOU2023 Evo responses 2,569 Table l illustrates those areas ol the M-ebsile Iliat recei￿ed the mo£1 page vIe￿S diiring the b'edr. mapping LliJsgls' unlLTr l'ure BOL aLliviti¥s. Thg majurilS' of users arriiTe.d tn the w-e.bEitp i'la orEanic se.arch 147%), folloM'p.d by dirp.ct-to-sitE. I.84%1, via Social N..ledia 11 1%) and by referrals Irorn other ￿'ebsiteS 17%1. The tnp-10 cuiinlrivs Irum ivhgrg users drrivg tu thg ￿'ebsIte dre lisied in Tdble 2, w'ith 62Th uf web￿lte u￿er￿ ha%ed out%ide the IIK1641t in 20221. Table 2- Top10 countries from where users arrive to the BOU website120231 l United Kingdom 2 United Stares 38 Canada 18 Spain 3 Germaw 4 Chin& France

BOU Annu31 Report & Account5 | 20231 8 BOU OUR SOCIAL YEAR Social media 8)LI.oR￿.LKIS0C￿l-KI-_D1￿1 lQ',e continue to USC Ylc rious Socllc I mcdia chic nncls to inform people Ic bout DOU aelii'ilies. drive trafliL ioNN'ards oiil ￿'ebsite and keep l)eople abreasi of the laiesL nrnitholoR}- re%earch i".ia the #nrnithnlo%y ha8h(a￿. @IBISJOURNAL Audi&nc& ai 31 23 22,234 +5% P05t5 3.431 -3496 X Iformalls, Ti4qlterl has iontinucd to undlrgo LhangLS in the last }'Lar, and Ihis is rellected in the reduced engagenient and inipressions our content 113s generated in 2023 (see side panel). Il'hile fullL)M-.er niinibers c()niinue tu increase. the r31e ol incrc'ase is not as greai as in prei'ious }.-ears. and our follo￿.-cr numbcrs have grown mure - in percentdge lertns Lin buth Fdcebuo)k dnd Instdgfdm. Impressions Engagements Engagomoni raie 37m -1996 69.330 -2196 1996 -3 496 Giveii disilliisionmenl ￿'.1[hin the clclc demic community on X. The hic ve explored allerndlive plailortns. inLluding Threads lopgraied by Mela Plailormsl and Bliiesky Ifroni T￿.1[[er co-founder Jack Dorse5'1. Despite iiiitial interest in Tlireads, our Lonient rei eived limited aiLentitJn. and sinie jniniiig Flluesk3' in late Oi Inber ￿..e ILTriusgd èfl(Jris gruwing folluivgrg Ihere. In rèLenl vears Tw'iiier has i'ery -succes%full ￿ delii-.ered a% nur parallel cnnlerence platlorin, alon£side bnth in-per%Dn and online conferences. The abilii}'- of alternatii'e platforms to deliiTer parallel conlerenLes ii'ill be an important Lonsideraiion ￿'hen ei'aluaiing their adoption. IBISJOURNAL Audience at 31 Dec 23 13,764 +1096 Post5 2.876 -2796 Impressions Engagements Engag&m&nc race 1.9m -4196 88.947 -3096 474 +18% Across our social l.ledia platlorms, our perlormance mea£ures favourablj. compared to the industry standard Icii'ie. Non-Profii and Membership Groups). w'ith 0.3 million tDtal iinpres%ion.% Ii.-%. 1.8 millinn stdndardl, 4.2(JO pnsts published Ivs. 1,1001 and l.i6.000 tot31 enEa£pinp.nt Ivs. 86,aOOI. IBISJOURNAL Audionce 3131 Dec 23 1,769 4696 P05t5 144 -2096 £oLial Medid d signilildnl LQ)ntribiitiJr tu the unline dltentiun thdt IBIS drtlLles receii."e, a8 measured b). Altmetric Attention Score. 311d IBIE continues to score ￿"ell Ivhen compared to ocher oriiithologs journals ITic l)le 31. Impressions Engagements Engagemeni raie 29,528 [phone]% -4296 Table 3: Onllne mentions for IB15and competltor ornlthologylournals lin 20231 @ibisjournal.bsky.social

ourpuls

mont￿nS NE￿ Audience at 31 Dec 23 366 BIDS Post5 175 739 36,702 698 443 32,083 1,830 1,484 145 44 Ornithology 577 7,287 367 195 3.989 2,510 26 t9q6 +796 6 +4q6 8q6 I Avi3n 8iology change2o22v￿23 194 6,031 316 70 4.564 346 .239b 22qb 484% l Ornithologg change2022 4,729 304 102 3,417 209 658 30 16% +13% 45% 167 4,100 34 42 3,722 +3ts%

BOU Annu31 Report & Account5 | 20231 9 BOU

theBOUblog

BOU.ORG.LJKJBLOGI Our blog coniinuc's to be the most-read scciion ol our 14rebsiie. accouniing for 28% of all page views in 2023 160.998 I'le￿'s. including Vie￿.$ ol individual blog posisl. During the }'ear ￿-e published I I I blDE post% l(l(l jii 20211 the 8ide paiiel lor the mosL read blog posts published in 2023.

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E-newsletters QU.JRG LKJE-NEWiLEFfERsI Our most-read blog posts published in 2023.. e published a tutal DI 32 e-n￿￿'s1elter8 durinkr the ￿ear. cuverinE IBIS new articles and ne￿, issue highlighis. and various BOU news iicms le.g. conlerenLes. granis. numinaiiun r(Jundsl. Parrot poaching in Peru and Ecuador Preferred species poached far beyond their abundances In tho wild Pedro Romero-Vid81 Univer51dod Poblo de Olovid¢ Sevtrlle, Spatrn Sponsorship We are ver}, grateful 10 Leica Camera IUKI who continued their support by providing d Pdir ()f biii()culdf% ds the prize l()r the best Pdper in IBIS b> 3n Edrl}-. Ldreer Researcher IF.CRI as lead authnr. See page lo fnr the recipient nf tlie Besi IRIS ECR Papcr 2022 1i-.oied Ii)r and aM'arded in 20231. to Use BirdNET Reviewing the applicatiOn5. performance and opporlunitie5 01 BIrdN￿ for bird rnoniioring Cristian Pére2-Granades unl￿ersity ofAliconie, 5poin General administrative items e coiiiinue 10 maiiitaiii a storage lacilii}- in Peterborough. Why do gulls steal from humans. Wh313ffects Aerring Gull food stealing behaviour In towns? Shubhi Raghav Univgisily of Exeier. Ul( Moult terminology Yosef Kiat Fieldmuseum of NufurtrlHisiory, Chicttgo. The rise of passive acoustic monitoring Using pa551ve acou511c moniioring for 5uwing bird5 in the UK Oliver Met<alf Mon¢hesterMeiropoliion Llniversity, UK

BOU Annu31 Report & Account5 | 2023110 BOU Awards Nominations Committee BOU.ORG UK]MEDALS-.4NB-A)IIARDS1 The Aiirards Nominaiions Committee was set lip in 2020 10 oversee the Lriieria and nominations process lor each ol the BQLI'S a￿"ardS.. the QJodman Salviii Prize. Janet Kear Union l.ILdal and Allred Neivion Lectiire. and, as 012093. Ihe Earl>. Profes%ional A￿'ard. Tivo meetings were held duriiiE 202.3 with further bu£ineE. coIiducced b}.- Lmail. AWARDS NOMINATIONS COMMIThEE Chair Dr Lucywrighl IRSPBI In 2023, we ran dll dri competition fur an earlv-career L)rnithulugical drtisi to) design the artiirork prizc lor Ihc new Earl>. Professional AThard. Il',e rei cibed nine Qualifying subtnissilins frutn six cuuntries dnd dt d selection tneeting in April, the Pdiiel uf judges (Tom Cadivallender. fteve F)udleN'. Rebecca l.ajdla￿-, Darren Rees, Riichel Taylor and Lucb. Ivrightl selected Zosia Frank0￿'Ska s silkcreen Giant Ibis (pictured as this repuri s cui-.er imd¥el as the w'iiining enlr J.. Zusid reLeived a 11.000 omniis5ion to produce 10 pieces of the artii'ork, to be used as the prize for the F.arl} Professional AM-.ard. The firsr reLipieni of the F.arly Professional A ￿ard, ro be annuuneed during Ihe eourse uf 2024, Ivill receive a Irdmed silkscreen prinl ol ZDsia % artwnrk. Members Dr Morta Acacio (Tel Aviv University) Dr Adham Pshion-Butt IBTOI Dr knneite Fayet Ifromluly 20231 20231 Dr Robert Hawkes Ifromluly 20231 Dr Gr3nt Humphries IHIDefAerial SuNeyingl Dr Rebecca Laidlaw (Natural Resouries The Committee s membership changed during the year. with the termb of three member8. Niall Burtnn, Keith Hainer and Elizabeth Ma8den, cfjmiiig to an end. Three neil, members, Annette F"iiJ'et, Robert I lam.kes and Kate RoEerson. Ivere appointed to the Commiti¥e al the Julb. CoiinLiI meeiing. Wale51 Dr Elizabeth Masden (University of Highlands Dr Kate Rogerson Ilromluly 20231 The. nppn call for nnminatinns M'as run Inr 311 four BOII a￿ardS frnm .lul} t september 2023. Foiir pc'oi)le Ithrec. Ivomcn and one manl Ivere nominaied lor Ihc 20?4 Godman Salvin Prize, sei".en people Itii"o ￿'0￿le￿ and fil'e Tnenl ￿'ere nominated fDr the 202* .411red Ne￿..(￿￿ Lecture. and Eeven peDple ItM"n ￿"￿[ne￿ and fib'e men) werc nominatcd lor the 2024 F.arly Professional .4I4ric rd. For thc Jcinet Kear Lliiion (leddl, iiu lie￿- IlDlllllldiiulls Vv'ere reLeii.-ed, but Idst J'edr the JKUN.'I subLunirnillee recfjmmended rnllinE Inrii'ard the )' aiid .'I' ranked nninination% lor con%ider3tinii in 2024. For eaLh a￿-ard. noniinaiions ￿'ere independeiitli. ranked lolloTh'ing previoLisIy dgreed iJruLediires. 'I'he tDI) three rdnked no)tniiiees lur edLh dll.drd ￿'ere preseiited to, and approb'ed b!, Council at their November rneetinE, and the top-ranked nnminee lor edch divard has accepied their inb'icdtion. Professor Jud>. £hcimuun- Bdfdnes ￿11] give the 202) Allred Nei4riun LeLture dnd the reiipients o)1 tlie 2024 Gudmdn Sdli".in Prize, the 2024 Jdnet Kear LniiJii Meddl dnd the 2024 Early Professional A￿.1( rd m.ill be ic nnounced during the course of tkLe >'ear. Dr Leila Walker, BCIU COO

BOU Annu31 Report & Account5 | 2023111 BOU Engagement Committee ENGAGEMENT COMMIThEE The fngagement Commiriee oi'ersees engagement bet￿een different paris of the BOU. Dur members and the ￿lder ornithological communit!, primarillw through LunlerenLes and so)Lidl mgdia aetivilies. The Cumniiltee s rule is Lo iiiLrgase aii'arenes5 of the BOII'£ activitie£, facilitate communication and collaboratioii iviihin the comniunilS'. and champinn equily. diNersit>' aiid inLliisinn. Chair Dr Tom Finch IRSPBI Members Dr Ailidh Barnos IBTOI Mr Ondrei Belfin Iczechial Dr Aonghais Cook IBTOI Dr D3niel Ha￿oW{E3rthWa[ch Europe) Dr Kaiharine Keogan IHiDef ￿trie1 Surve￿) Dr Nicola L3rgey (University of Highbnds and The Coniinittee meL onl}- once durinK 20?3, due io the Cotnmittee Chair beinE on parcnial leai'e lor part of Ihe year. Committee mcmbership rcmaincd IinLlianged Ihrough Ihe >ear. th(Jugh the lerms (Jl four Jl mèmbers are due lo eume lu an end in July 2024, with the public round of nDminalions to seek their replacements reconLI}- haying closcd. Social media DrVeronic3 Mendez (Unwersity of Iceland) Ile are continuing to explore alternaiii'e% to X IT￿-it(er), Vv'hich rem3in% niir pritnary sncial media platform boih day-to-day and lor the delii'ery ol open conlerenLes lin parallel ￿-1th Zoom or in-person evenisl. The BOII is LurrenLI}.- aLlive on Bluesky ',1 l ￿-hich, ds DI Idte 20'?3, is no)ii- upen to i.-iew 14-ithout an account. At the time of M'ritiiig, users still require an ini'ite code to creaLe an account of Lheir own. bui there seem to be pleiity ol these codes going aruund. Mr Connor P3nter, 8108 Editor (University ol Nottinghaml (to August 20231 Mr Charlie Russell (Unwersity ol Ea51 Anglial Ifrom August 20231 Dr khley Sendell-Price Iuppsala Univer51ty. 5wedenl Dr Elwn Sharps (Natural Resources Wales) Dr Leila Walker, BOU COO Membership This year sail, the launch nl niir reiTamped Member Cnnference Aiiendance Grants. 'ilh d lui iJn liinding ID￿.CdrbVn trdl'el dnd rgniDlg atienddnie. -l-he grdnt uppfjrled I I BOII member8 tn attenrl the Eurnpeaii Ornithnlngi%t% Ilnion IEQITI Conference in l.iiiid. Sweden, and the AuftrJla%ian Orniiholngical Conference in Brisbane, Aiistralia. Sek'eral of our grantees hai'e ivritten about their experience over nii #theBIILblTr%.' see .11 Application% lor the 2(124 round ol h.leniber Conference Attendance Grants closed on 18 beb 2024. ￿"1th funding aiTailable for Ihe EOU Flc.dglings N.ILeling (Pragiie. CzeLhial and thL American Urnithological Society Annual Meeting (Colorado, US.41. Dr Saskia Wischnewski IRSPBI Dr Natalia Zielonk3. Social Media Support Offitor Iuniversily of East Anglial Fe hai-.L' also changcd Lhe way in ivhich I0￿- and mi(IdlL'-ineL)mc countries arc defined, iii order to ensure consistenc 5. 3nd Idirness dcfoss BOU aclii.-ities. So, il N'ou dre Irutn and/()r li1.-in￿ in a c()uiitr)' that appears L)n the DAC List ol ODA Recipient S.'//u'M"￿..0cCd.0r li. I 11 Ill 11)en you w-ill be eligible lur reduced niemlJershi subscription rates, and can al%D appl5. lor %nine ol QLir grants, bur%aries and aii'ards as a non-member, Support Officers The Committee s .£ upport Officer£ drive a large. parl of oijr work around conference d¥lii'er>'. journal publiciii,. social media aetivilies and the BOL blog.

BOU Annu31 Report & Account5 | 2023112 BOU 2023 sa￿, Ihe rcliral ol tlirec ol our four Suppori Officers, leaving us M'ith seb'eral Vdcdncies tu lill. lii dll Cd5es ￿'e ￿-.ere redlly encourdged by buih the qUdlit}' dnd quaniii!. of applications. SUPPORT OFFICERS In Au£usi M e inleri'igwed Ldndiddles for Ihe rule of BIOA Edilur. pre￿i￿liS1￿ held by Coniior Panter. The BIOR Editor 1% responsible for £ourcinR. editinE and publishiii Lnntent fnr our tivice-M"eekly blng l#theROlblngl. This year saTh I I I ne￿. pDsts nn

lheBOUblog, inLluding drtlL les ivriiièn Liur Juurndl Suppuri OlfiLer. auihurg of

IBI.£ paper%, 3Uth()r% ()1 paper% publi8hed ill ()ther juurndl%, c()mtnunity dl-ticle lincluding our #F)iversiiyfSlog serie%) snd other Ineinber articles (including. lor ekdmple, rgpurts Irum gi.'gnts allend¥d bsll mgmbers suppurted IhrLTrugh Jur conference Attendaiice CJrant%l. Ive are delighted to hai.-e Charlie Ru£￿ell, a PhD studeiii at UEA, on board as our ne￿.- Blog Editor. Since startiiig iii September. Charlie has been ivorking on some exciling developments lor #iheBOUblog. so waich this space. Our new Coriféreiiè iuppori Officer from 2023, Ondfel Beltln In £cpiembcr ￿-.C conducicd inicrvlc￿S lor the role of Conference Support OlliLer. This role suppurts the deliN'er}' o)1 uur online dnd in-person LonlerenLes, and hds been expertl5-' %culpted bs. R}-3n Burrell since 2020. Ile re ple3%ed to nom" have Oiidlej Bcllin in place ic s our nei4.- Confcrcncc Supi)orr Ofliccr. Oiidlcj hc?s lois of experienLe organising looin è?èi)Is lor the C£ech Socièi!. for Ornilhology dl)d has hil the Rr()und runninK, helpiiig to deliN'er our online member Ildrhdm eNeniiig diid oiir autuinn Globr?J /,JyTI.{?I's conference in early and late Noyember. respectivel),. in311}', in Decetnber w.e interviewed l()r d repldcement fTrr Trur long-seriwing and highly-produciive Journal Support Officer. Jente Oitenburghs. Jente I4rrote 2J articles Il I lor ihe BOII blog in 2023 land an impressik'e iolal of 123 blogs durinLJ his lime M-ilh us), summarisinLN a variety ol paiJerts published in our journal IBI.S. lfye are reall> pleased to hai-.e recentl￿ appointed A%hleigh N.larshall as our neiir Joiirnal Siipport OlfiLer- she ii'ill l)e responsible lor ￿'ritIng lorinightls, blo£ posis eoverink published IBIS ariiLles. An unexpelied oiilLon)e ol a highly ompetitii'e recruitn]ent proce.ss is the appointment ot Bob hqont%onierie. an Emei-irus Profcssor from Queen s Unibersiib.. Cana(la. as a regulclr coniribuior to

iheBOUblog. covering Ihe hisiory ol orniihologN'_ I4.'alch Ihis space!

Our new Blog Editor from 2023, Charfie Ru￿ell Ifjle rc iTers' pleased thai Natalia Ziclonka has agreed 10 siaN' on as Social N..Icdia Suppuri Ollieer lur dnuth¥r twu yedrs. Desplte th¥ lurmuil fLTrIl(J￿.1rtg the chdngg ul ownership land namell 31 TM"Itter/X. uur lulluwer cuunt continues to Krow122,000, compared to 21.000 this time last J.'earl, and our Ti4.'iiierlX conferences coiitiiiue to be suecesslul. In April 2023. Naialia deiTised and deljiTered our i-.er), lirsi Twiiierlx conlerenLe tu be riiii in Pdfdllel ￿-1th dn in-persoii cDiilerenLe IBOU2023 Eynlutionary RespDn£esl nn mean le.ai i¥hen T￿.Itter presentatinn5 are deliye.red alongside live in-pcrson ialks and ￿'aS SULLessful in reaLhing oi.-cr 6? 000 accounts Vld the LunlerenLe habhtdg I#BOL2023 Our new10￿ri)&1 5uppoi( Ollicer, ￿hle￿h Marsh311 uer ."&f=.I' l. Qur fnllower

BOU Annu31 Report & Account5 | 2023113 BOU count has also increased on facebook (from 12,000 to 13,0001 and on Instagram Ilrom 1,650 to 1.8751. man￿ Ihanks to our ouigoing officers Connor, Ryan {Ind Jente lor their huge coniribucions over the last lew vecirs, and a big DOU M'elcome to Chcirlie. Oiidfej and Ashlei2h. IBIS Management Committee BOU.ORG.UK]IBisI Committee membership and business The IBIS l.landgetnent Lummiltee prui."ides slrdregic direction. suppurt dnd ddi'ice t editors and fialf on the m{Inagement ol the journ<il incliiding ￿'][h our pijhlisher. lQ,'iles'. The IRIS N.lanagement Coinmittee consists ol the Fdiior in Chief. all editors. Ihe Chief Operaiiuns OIIiLer. Ihe H(Inordf5, Treasiirer, the Juuriial Mana£vr dnd up 10 four reEular members Operatin￿ at Associate Editor level for IBI£ or similar journals. IBIS MANAGEMENT COMMlffEE Chair Dr R05emarie Kentie IIBED. Unwersity of Arrisierdaml IBIS is published on behalf ol the BOU bs. IVile}' Publishing. from iirhom ￿'e Lonlinue t¢) receii.-e excellent serb'ice, suppijrt dnd adi-.ice. Ti)wdrd% the end ijf 20?8. lfyile}- underwe.nr sonie reorgani7.ation ol Iheir teams, and li'e noi4. I4Tork c105elN' 11-Ith both Andreas Petersen. previousli, our Journal Piiblishing Manager and noiv oiir societ! coiilact in the Partner Piibli%hinE teani, and with (Jeilevie￿e Richard8, nur editorial onlact in the Publishiiig Dei.-elopineiit team. The efforts ol Wiley %iafl during 2023 are Rreatly appreciated, and I4re are enjoyinx workin£ closel} w'iih both .4ndreas and GeneN'iei-.e. Witliin Ilile J.. 8ei-.eral specidli£ed iedms Isiicli as Journal Marketing) are nou-. ai'3ilablp. tn proi'idp ￿Uld3]Icp. in thp fast-clianEinE publishin& landscape. Il'e have an exLellLnl relationship ii'ich 11-ilcy an(1 mainiain Lonstant LommuiiiLaiion thrDughuut the vedr, ii'ith both Pdrries striving lu impruv& IBIS, lu ensure the iuurndl remain% at tlie forefront of nrnitholoR}. Members Mr Graham Appleton, BOU Hon Treasurer Dr 8eair12 Arroyo Lopez Ilnsiiluto de Invesiigacion eD Recur505 CinegetlC05 IIRECI ICSIC-UCLM-IICMI Dr Rauri Bcwie. Editor Iuniverslty of C3lifornia 8erkeleyl Dr Richard Broughton (UK Centre for Ecology & Hjdrologyl Dr Simon Butler Iuniverslty of East Anglial Our annual meelinx wilh Il'-ile! ￿".35 lièld on loom in March. Ai thè mèeiii)£, annual reports covering editnrial, productinn. markeliiig and 11113nce Vvere presented dnd discussed. Our clnse wnrking relatinnship cr)mes tn the fnre during these meetings 'ilh boLh sides able to talk openly about our joini management of the journal. Queen513ndl Dr Rebecca Kim￿￿11, Ediior Iuniversity of Mrs Angela Langford,lournal Manager Dr Ruedi Nager, Editor IUDiver51ty of Glasgowl Dr Leila Walker, BOU COO ProflerernyWi150n, Editor IRSPBI

BOU Annu31 Report & Account5 | 2023114 BOU Journal metrics Ith WilcN' bcconiing a signatory ol Ihc Dcelaration on Research Assessment IDOIL41, the Il'"ile}' IB15 website nuw d15pldyS d fdn¥e uf jDuriidl dnd drticle tnetrics. The oi'erarching goal of DORA is ro f hift emphasif awav frnm journal-based metrics. tou'ards arLILle-level Inelrics an(1 iiidividucil Ic Uthor coniributioii lor a broader. more eouitable view. and assessmenl o)1 research itnDaLI. Alonxside Juurnal linpdLI FaLior l? l in 202?), authors can li0￿. I'ieM-. Cite£core 14.5 in 20221. .louriial Citatioii Indicainr11.Jf) in ?0221, full texc N le￿-S 1.12.8.60A iii 20221, ai-cepianLe rate14f)% in 20221. subn)ission lu lirsi deLlSlUll171 days in 20221 dnd submission 10 dl LepianLè 1263 in ?0221. Difficulties in lindinE reviewer% ha% beeii identified d% ()ne Cduse of delaj's in the %ubinission to a(-("epian("e pro("ess, and something thai IRIS Mdndg¥m¥iil CLTrmmilte¥ ib luuking tLI dddress. TOP CITED PAPERS From most recent Impaci Factor period12021- 20221 Estimating bird densityu5ing pa￿l¥e acoustic tnonitoring a r￿leW of tnethocts and suggestlonsforfuther research i CriS113n Pprp.z-GirdnAdo5,IiiAn TrdhA I DOI Intra-specificvariation in migr3tion phenology Editorial team ofAmeriian Kestrels IFGkospoKveriusl in respO[￿e to springternperature5 1 Bre3nna F Our AssoLiaLe Editor Board plays a ipjial role in Lhe managemeni ol the journal and Powers.la50n M. Winiarski.luaD M. t2equena- 'e thank eacli dnd eN'ery one of them lor their time and dedication to the jDuriial. 11-'e welcnmed tii-o ne￿. AssTrciatp Editnrs.. Andre.3 £nriano Rpdnndn and Juan Nai.-pdn. Four Assoeiaie Editors rciired from the board aficr man). ycars and handling man>. mdnuscripts, dnd we ii'ant to thdnk thein fur their exLelleiit M-urlc.. Stdfldn Roos. EiN'in RO￿1￿31t, Jose Antonio .£anchez Z3Pdta and Ariun Amar. Ive currently hal'e il Associate r.ditors. Null effects of the Garcelon harn￿￿ng method and transmittertype on soarfng raptors Iviilur GdfLid,Iudnluse IbTlgsid£- Lebrijd, Rubèn Moreno-opo l DOI Reviews and mini reviews IBI.4 ha4 a proud histor￿ ol publi%hing critical revieM'% of current tfjpic% in ornitholog}-. and li'e continue to encourage re￿Ie￿-. submissions toda>.. especially frntn Edrl5' Cdreer HesedfLhers. -I'hdnkb tc) this dLtive prJm()ii()n. Ilre hdlPe illlfgdsed the number of review subinissions and subsequent publications. Froni 2020 until now. 66 rei'ieiv submissions h81-.e been handled by our Rei-.iei4'. fdiior JereinTr M-'ilsnn, of ,hich 26 ￿'ere published I￿.1[h a couple siill in the pipeline). In comparison. betw'een 2013 and 201IJ 66 rei."1e￿.. manuscripts m.ere subniitted of ￿'hILh 16 publishgd. MOST DOWNLOADED IBIS PAPERS Papers published In 2023 BirdNEf'. appIl￿tIOnS performance, plrfalls and I￿u￿ opporoJnlt1￿ i Crisiian Pérez- £omc of Ihese hi%hly cited revIe￿..S feature in a 2023 'Besi ol Rc'vieivs ipiriual issue covp.rinR topics as dive.rse as thp ￿lobal pxpansion al ai'ian influp.nza. de.cline.s ol Afro-palearLliC migrani birds. clfeLts ol Llimate Lhange on moiintain birds. shorebird siirvib'dl, sedbird lurdging. and a rdn¥e of teihnulugical d¥vèlopmenis in nrnitholaKic31 inDnitnring. NestsuNval of threatened Eurasian Curlew INumeniu50rquotul breedingat knwdensities acr05sz humzn-modtfied lands(zw l Harry Ewing Samantha Frank5,lennifer Sm3rL Niall Burton.lennifer A Gill I In 2023, w'e launched a nem. Category of mini revieivs., these are reviews ￿'1th a 6(JOO-word liinit aiid are ￿'ell suited for enierging area8 ol research interest Vv'hich currentl J. hab'e liniited primar! literaliire. or lor critical reI.-ie￿-S of niore specific siib-tOPlCS I4'1thin broadc'r rebeareh areas. Human attiviues at nLqht negat￿ety Impatt Little Penguln (Eu0￿p1￿1UmI￿ort nUrnbe￿ and beha￿lourS l Em ly C Cortello, Diane Themed issues Tivu IBIS themed issues. inspired bi, recgnl BOU LLTrnlerenLes. A Tr'ldn RttpE-vdtJL'fiu and Cliizen S(ienLe RndBirds. are in pi-ogress and due 10 appear in upcoming isbues of IBIS.

BOU Annu31 Report & Account5 | 2023115 BOU Rex submission portal 2023 ￿..a$ ihe lirsi Lomplete }ear ￿-1[h 11 ile} s new ResearLh Exchange IReXI submission portal lull}J operational for IBIS. hak'ing gone lii'e in Noi'ember 2022. -1.he Hex Dorlal aims lo improi'e the suljmission experienLe for aiithors, reduLlI)g the 'ork and time Ihai goès inio rnanusLriDI subn)issions. Ild a Strèdmlined proLèSS and intuitii'e pldifurm. 'l-he rDII-uiil hds %une stnuuihli. dnd w'ith sutne tninur tm-edks Ilur exdtnple tndking the Dual Ldiigudge Abstrdlts optiondl file designdtion mo)re pro￿l￿entI M"e are happ}". that Rex is performing ￿'ell. TOP ALTMETRIC PAPERS Hi8h wtho8enicty3vian influenza IH5N11 in Northem Gannetslmorus b(Jssunusl.' Glotkl spread, clinical signsand demographic Cor￿eqUences1Ude V. Lane, lana W.E leglinski, Stephanie Avery-Gomm, Elmar B3115taedL Ashley C. Banyard eL31. DOI-. Marketing IBIS PdiJers Lontinue to dchie￿E hi¥h AlimetriL sLores, with IBIS dltrdLting the tnost onliiie mentiuns lacruss X, Fdcebuok, blukFS 3nd tnurel in 2023 dmDnLT dll ornithology journal,$ I,sce T<lblc 3 on Pclge 81. See the side panel for Lhe highcsi Alimctric ,scoring IBIS papers piiblishèd in 2023. Reduced breeding Succ￿5 In Great Blad(- backed Gulls ILJrus morinusl due to harrn￿5- mounted GP5 d&ice ￿MU@l Larglois Lopez, Gary D Clowley, Daniel T johnston, Francis Daunliared M. Wilson, Ninal- O'Hanlon, Best ECR paper Fe annuall}, aM'ard a be.st IRI.£ F.arly Career Rese.archer IF.CRI pape.r, ￿'here the. first or iurresponding author ivas an ECR. In 2022. 59 rjdpers oualiligd, of M'hiih I I ￿'ere nL)mindted for the dll'drd by uiir As5UClate EditL)rs. These I I nutnindted Pdpers ￿"￿￿t to a public i'ote in 202.8, M"Ith l osel Kiai's paper on making moult terminology simpler being i'oted the winner Isee side panel and Iiti s'.Ilbou.or .uklibis/ibis-bes1- ecr- èr-ot-21; NestSUrnT¢al of threatened Euraskin Curfew INurneniu511rquotLII breeding at lowdensities across a human-modified kndscape Harry Ewin& Samantha Franks.lenniler 5n)art, Niall Dletary nlche overlap and resour partitioning3mongsix steppe passerinesof Central s￿1￿ using DNA metsbarcodinglulia Zurdo. Adrian Borrero. Lui5 P. da SINra. Daniel Bustillo-de la Rosa,lulia Gomez-cotasus et al. EGR ts'Abir, BOU Yosef KJa¢s paper was voied Iho besi ECR Moulttermlnolo8y'. Lets make ff 5Implerl

BOU Annu31 Report & Account5 | 2023116 BOU MEETINGS COMMIThEE Meetings Committee Chair The h.'leetings Comniiiiee is re£poiisible lor maintaining the ongoing programme ol BOLI Lunfereiices dnd prDI".iding ddi'iLe dnd suppDrt tu tlie BOLI OffiLe dnd iJthers responsible lor organising and running F40L ei.'ents. The ConimiLtee mei remotely via Zo()m three lime% during the s'edr and al%0 L()ndiiLted busllless b}. emdil. J()%e Alves, Maria Bogdi1nDva aIid.4manda Trask leli Ihe Cninmiiiee this year and ￿'t ￿.-[Tru1￿ like to thank Ilipm lor their Ere.at work. IluEe. thanks arp dup to Francis Daunt, Ivho lefi Ihe Commilleè as Chair in ilpril 2029, having sieered ihe Committee and BOU conferences thrL)ugh s()Ine clidllenging limes. Catl'iond Nlorrisun hds Srepped iniv the Chdir role 3nd Bdrr}." N.ILNqdhDn, Einilb. %immDnds dnd Alice Riseli. all joined as new members and we ￿'elCOMe and look lorm'ard to u"orking ii'iih them. Dr Fr3nc15 D3unt (UK Centre for Ecology & Hydrology) Ito April 20231 (from April 20231 Members Drlose Alve5 (Universirg ofAveiro. Portug31 and University of Iceland) Itoluly 20231 Dr Maria Bogdanova IUK Centre for Ecology & Hydrology) Iloluly 20231 Dr Yotherine Boothlones IBTO Northern The Committee ￿'OUld like to Ihank our expic nded 9023 Lonlerence deliver}.- team ol Br}'ain Aguilar, %arah Biniiie, RJ'an Burrell. Camiln Carneirn, kna Luiza Catalann. Hdnndh Here￿ drd, Triiii Kdsgikii, .4ng¥la LdngfiJrd. Claire N'emgs. Chdrlie Russell, Nicnla Snckhill. Saniaiiiha 11 nn￿ Tnpp. Qiqi l'ang aiid Natalia Zielnnka fnr all their hdrd ￿.￿rk. Our LDnlerenLe Siippuri OlfiLer Rvdn Burrell stgDped duwii this yedr and 'c thank him lor his laniasiil work. being instrumental in thc dcvclopmeni and d&lii'er}' ol our iJnline conferences Di'er tlie Idst leii, }'edrs. Ryan is succeeded by Ondfej Bellin who goi off 10 a strong start ivith rhe succcsslul delii-.ery of our online member M arliam ei'ening in earls, Nob'ember ?02,3 and our autumn conference, OLlsLi23 Glob&JPlI'ktr'kJ s. later in ihe bame monih. Dr Christine Howard (Durham Untversityl Drloolene Hughes IRSPBI Mrs Anuela Langford,lournal & Office Managor Dr Barry Mcmahon Iuniversity College Dublin) Ifromluty 20231 Dr An3 Payo-P3yo (University of Nberdeenl 2023 annual conference EvoJutsonaryresponses (#BOU2023) 4-6 April 2023 This ￿..a5 our lirsl in-Derson mèeting sinLe Ihe global pandemic and IL I4'as great io be b3ck tokrether. The conference il'as lield in N()ttinLThain and l()cused evolucionary and plasiic rcsi?onscs ol birds to cnvironmcntal chic ngL,. 11-c hic d 84 people in attendance ol w'hom 3,1 ivere Ec1 rl!. Cilreer ResearLhers IECRsl. Ivhich In3de l()r a Iriendly enN'ir()ninent Vv'iih great ￿et￿-￿)rkIn￿ ()pportuniiies. The conference sessions spanned phenological changes. moi'ement and space use, rcsponses In en￿ir￿nMQn1al polliitinii. genciic and cpigenctic responscs, rapid responses tu ￿baniSdtlon, behdvioufdl dnd rnuriJhulugiLdl Lhdnges in nui.'el environnients and species interactions and communiiN'_level responses. .lane Reid Illiiivcrsiiy of Abcrdecn, UK & NorM'cgian Universit} ol £Lience and Technology) delivered the Alfred Newtun LeLtui'e titled 'liilegrdting sedsundl ￿￿%.-￿InentS into evoluLionary ecology . The keynote pre£enter£ ii".ere Ben fheldon Iunii'ersity of Oxford, UK). Joe Ivynn Ilnstituto of A￿l<ln Re£e1c rch. Geriiil< nv & Lniver,sit!w ol Oxford. UK), Caroline Isaksson (Lund Unii'ersily. Swedenl, Ariid Husbs. IL"PDsala Univer%it}', ￿￿"ed£]1). .4nne Charm3ntier (Centre fTrr bunctiniial and EvoluLionary Ecolog), CEFE, Francel, Daniel £01 Icentre of Ecological Research and Applied Foresir}' s. CREAP. Spain) and Rose Thorogood (Universit} ol Helsinki. Finlandl. Il'-e thank the Scientific Prograintne Conimittee ISPCI for putting togetlier an eicellent pr(Igyramnie. The Ciiinmitiee R4-3.s chdired bi. Amanda Tra￿k IZ()()l()gFical .£()ciety lif London. UK) and Maria l.loiron IIIisiitULe of Avian Rebearch. German}.-l. supported b5, 20231 Dr Emity Simmonds (Norwegian Univorsity of Science and Technologg & UDrrfersityof Edinburgh) Ifromluly 20231 Dr Amanda Tr33k Iln5titute of Zoology) Itoluly 20231 Dr Leila Walker, BOU COO Dr Kevin Wood Iwildfowl & Wetland5 Tru511

BOU Annu31 Report & Account5 | 2023117 BOU Michel8 Corsini ILlniYersity of Warsaw, Polandl. Ferran Sa)ol (University College London. UK). Jelmer Samplonius ILlnibLrsiib' ol Edinburgh, UK) and Emil}, simmonds {Nur￿..e¥ldn Universit J. ol Scieneè dnd TechnLIILIEyI. 2023 ANNUAL CONFERENCE Two P.CR events also took plic ce at Lhe coiilerence. The first included Lwo ivorkshops un ¥lgvaior pilLhes and Laregrs uuiside aLademia led Ldl N.lorrisun IUniv¥rsiL}' of East AiiRlia, UK), Natalia Zielonka I[Tiiiver.git￿' ol East .￿n￿lia. UEil, Ailidh Bariie% IRriiish Trust ft)r OrniLlit)It)gv, UK) and Charlt)tte Regan IIIK Cenrre Ir)r F.cnlng}' & Hydrulugyl", thanks lu all. The seLund ivas a roiindidble ek'enl 11,here sludenls gLTrI Iu Erill the ke!n()te .￿peaker￿ on subjects ranKinE IrDm career8 tip% t() their fdV()urite fieldM".ork experiences. over a drink or tivo served by our outgoing President Juliet ViLkery. EVOLUTIONARY RESPONSES 2023 autumn conference 4-6 4)ril 2023 | Noiiingham & X

BOU2023

Globalflyways I#BOUsci23121-22 November 2023 This n()N'el Lonfereiice Spdnned d 24-h()iir period duriiig ￿'hIch presenter% coi.-ered three glnbal f1￿￿-.8Ys .4friia-F.iirasia. Americas and Asia-Pacilic - and ￿.-8S aiiendcd b} 176 online participaiils. Thc Alrica-Eurasia sessioiis coi'crcd drivers ol PL)puldliun change dnd cunseri".dliiJn, delermindntS o)[ nii¥rdliun ro)utes diid SLhedules, and tracking applicaiions, concluding with a panel discussion on rnakiiig Ilj'wa}- ecology globic l. The P1( nel ivas chaired by Juliet Vicker! ￿'1[h contributions from panel meinbers Mohdmed Henriques ILlniversil J. of Groningen. Ihe Nelherlandsl. YahkaL Bar%hep IA.P. Leventis OrniilioloEical liistitute, NiEerial and Leon Beniiiiii IThe Biodiversity Coiisultancy & Conservation qcience, Universit) ol Cambridge, LKI. This greai ei'enl opèned up disciissioii on hoiv lo iaLkle barriers eonsiraining more reRioiiall! balanced researcli and conservation. FOllo￿.in￿ a Traiis-Atlantic keynote bridging fly￿.8￿.5. the Americas fly￿'aY £es£ion£ covered glnbal perspectives and big daia in the Slud>' ul migration. full dnnual cvcle eculvgy ul Nedrciic- neotro)PiLdl mi&Frants, mDnitorinkF niigrdtioii in the AmeriLas, dnd kTenumiL5 and evnlutinii of migration. Next up Ihe Tr311.5-Pacilic ke3'iiote, leading u seainlessly Into the Agia-Pacilic sessions, ii,hiLh spanned 113wiva3.' threats and conservation, from mi¥rdtion Pdtterns tu hdbitdt conservation, dnd novel IrdLking discoi.-eries. 2023 AUTUMN CONFERENCE -l-his LunferenLe Wds d Irul}' interndtiundl Lulldburdtiun bringing lugeiher resedfLhers frotn across tlie Elobe. It ￿"aS 3 tribute to the hard M"ork of the SPC members and we thank rhein enthiisiasticall}1 Tlie .SPC ￿-aS co-chaired by M-.outer l.'ansreelant Iuniirersily of Groningen, the Netherlands) aiid José .Qli-.es (universit￿ ol Iceland & Lnii'ersit!. ul AveirD, Purtugdll dnd inlluded l DjteLh Brlik Ichdrles Lniversit J., Czechial. N..laria Dias IUniversiLy of Lisbon. Poriugall. Sieve Dudle}, IConsulianL, Scoilandl. Cal Morrison Iuiiiversily ol Easi An£lia. LIKI and Elham Nourani (Max PldllLk Institute iJf .Qninidl Behdviuiir. Gerniaiiyl IAfriLd-EurdSld I1}.￿ d!-l-, Ell J. Knight Illnii'prsit}' nf .4lhe.rt3. Canada), C3mila Cioinp.z I£ELV.l. Cnlnmhial, Fpngji Clu IPrinLLLon Universily, USAI, Br3.-ani Dossman IGeorgetoThn LniiTcrsil}, USA) IAmericas Ilywd!I", and Yachdng Cheng (Sun Yat-sen Llniversity, People s RgpubliL nf Lhinal. %a}-am Cho￿'d￿Ur3- IUniYer%it3- ol CambridRe. UKI,11-niig Ding Li. BirdLile InlernclLional. Siiigaporel. Judit Szabo (Chic rles Dclrii'in Uiiiversi15'. Austric lial. R. GLOBAL FLYWAYS 21-22 Nfftmber 2023 | Zoom & X

BOUsci23

WikiftEdi8 Commons

BOU Annu31 Report & Account5 | 2023118 BOU Sure%h Kumar IMTildlile Institute ol India, India) and Aatmunkh F)aNaasuren Ilvildlife ScienLe and Conscrvaiion Center of Nqongolia. Nlongolial I,4sia-Pacific 11!'w'ayl. 2024 CONFERENCES Future conferences We hai.'e a dii'erse selection of topics coi.-ered b! our upcoming conference program.. 2024 annual conference - Urban b￿dS I#BOU2024) 9-11 April 2024- Uniyersity of Nottingham, UK A tunlerenLe dimed dt discussing the unioue issues fdLed by iirbdn divelling bird pnpulaiinns in our changing ￿'or1d. The Allred Neii.-Eon Lecture i¥ill he delivered by Ilmaiida D. Rodeilrald. Gari'in Professor ol Ornithology and Senior DireLtor of Ihe Cenler for A￿.]dTr Pupuldtiun Studies, Cornell Ldb uf Ornithulug J. dnd Depdl'ttnent of Natural Resnurce% and the Enb'ironment, Cornell Llniversit}', Ithaca. Nl,. URBAN BIRDS 9-11 Ppril 2024 | No=tingham & X

BOU2023

2024 autumn conference- Birds andlletzero I#BOUasm24124 October 2024 - York, UK This conference aims to showLase Ihe latest research inio the ecological impacLS of our Iransilion to nei zer(i on birds. Image HOu59pbliOw I zeynlCebeci CC BY-SA4.0 2024 autumn conference- Avi8K coJ3serw3tson translocatsons I#BOUsci24) 12-13 November 2024 - Zoom This Lunferenle tu shdre knuwledxe and experieiiLes Irum PdSt, Diiguing and planned translocation programmes to inform future Iraiislocaiion efforts. 2025 annual ¢onferen¢e - Frontiers m omtholo&y(#BOU 2025) 1-3 April 2025- University of Nottingham, UK This is an excitiiig conlereni e. briiiging togerher researchers. conservaiionists, and iJuIiL5' tndkers w'iJrking dt the Llltlin¥ ed¥e uf urnithulu¥iLdl rebedrLh dnd ciJn%ervatii)n, t() Share their kn()M-ledge on hi)￿. inn()Vdtii'e techni)Ii)gie% dnd n()Yel ,Ipproaches can help us lind solutions to conseri-.e bird5 in changing ￿'or1d. The Allred ioii LeLture i4".ill be deli¥'ered Jud%. Shamoun-Baranes. Professor of Aiiiinal MoiTement EcnlnE!' and the head nf the Department nl Thenretical and Compuiaiional Ecology, In£iitute of Biodiversity and Eco£y£teni Dynamics IIBEDI at the Universiiy of ,4msicrdam, thL Neiherlands. BIRDS AND NET ZERO 24 Oc-,ober 2024 | York & Zoom & X

BOU8sm24

Conference review This year a conlerenLe rei.-iew panel, chaired b}. Nqark Eaton, tnel in June 2023 to discuss Ihe future uf ROLI conferences. Ille di£cussed the aims L)1 o)ur cunferences, metrics ol success an(1 i)ossiblc future dLNelopmciils. Thc panel concluded that our conferences should aim 'io siippori Ihe ornithologieal Luinmunily around ornithological science ￿-1th our main meiric% measuring the success of thi£ being attendance numbers, scieniific qualit>'/atiendee ,%atisfaciion. financial incorne and membership reiriiilmenl. IITe dlread}' have sek'eral allivè new. ideas tn make niir conference8 more acces%ible, for ekample our lir%t hybrid confe.rence Bird.5 iiet 7ero. one ol our 2024 autumn conferences. M."ill take place in Ihe ￿-eLl-cOnneCted locaiion ol York. In planning luture conferences, the N.leeLings Commiiiee ￿.111 aim 10 AVIAN CONSERVATION TRANSLOCATIONS 12-13 Nooember 2024 | Zoorn 8 X

BOUsci24

lrnage Commonlrane | Zwdcebecilc ￿-S440

BOU Annu31 Report & Account5 | 2023119 BOU fulfil Lhe criteria sel by the rei'ieM'. acknoM.-ledging that noi all criteria haNe to be met by each conlerenLC. Grants Committee GRANTS COMMirtEE AOU.OkG.LIKIFUNniNGI This Conimittee adviEe% Council fjii the %electioii of re%e3rch grant and bursar}, applicaiinns tliat the flou shr)uld suppnrt. Chair Dr Sony3 cle￿ (University of Oxfordl The CDmtnittee cunsiders applicdtiDns lo)r'. mall Research CIrants'. CarLC'r DLVLlupmLni BursariLS'. pen tu BOU members Liiid non-members in low- and tniddle-inLome couiitries. John & Pat 11 arhani qtudentships.. lundgd hy a beougsl lefi IL) Ihe BOL,. b J. thè laie JulTr and Pai 11 arhan) lur thp. stud}, £php.nisciffjrni Ippnguinsl and PrncpllariifTrrm Iiubp.nnsesl seabirds. Brenda and Tony Gibbs ilivards, funded by a beque%t left to tlie BOL b). the late Brend3 and TDlls." CJibbs, lor rese<irch on Lf<icking and migration £iudies including Ilie use ol new technologies. Members Dr Tom Bradler-Lawrence ItSP81 Dr D3vide Dominoni IUnii'er5ity of Glasgowl Ros Green (University of Liverpool & BTOI Ifrom March 2023, role-sharingl Dr Marlin Sullivan Imanchesier MÈtropolit3n Dr Leila Walker, BDU COO The Cominittee mei Liiice via Zoom in ?02,3. The nieeting to con£ider re.search grant and Lareer dcvelopmeni biirsclr}.' applications was held in Februar!,. and thc. mceiing tri innsider appliidtlDn5 lor the Brendd dnd Tony Gibbs Aii'drd ivds held in Jiine. The remainder ol the Comtnittee s business ￿"3S conducted by email. Ros Green joined the Committee in a role-sharing capacity with existing membèr Sam Patrick, from l.larch 202,4. Small Orniihological Research Grant scheme Thc Comniiltee rcceii'cd 31 grant applii ic tinns 145 in 2022. 54 in 2021, il in 20201. Onp. applicatinii ivas rp.jp.cted due to brpachp% in Submission critp.ria, leaiTIn￿ 30 tfj he assgssed ahead ul the annual meeling held on l Februari, 2023. T￿0 oualilied fur funding consideration under the Brenda and Tony Gibbs bcquesi. EaLh appliLation was %cDred b}- t￿.0 cDn]Inittee memberE and ba%ed nii the%e %cDres, the a%￿￿clated cutTrment5 dnd Dn-the-ddy discussiDiis, the curninittee determined M"Iiich prDjectS tu support. CDunLiI dpprui'ed seven drds, tutdllinx L12,837, tu be tnade in 2023".

BOU Annu31 Report & Account5 | 2023120 BOU Laura Céspedes Arias Icolombianll £2,000 latnount requested) PhD stiident. UniF'ersEtTf of ChJi,7go. L'S.4 l-he evoliilion ol reDrodiiLtive igolaiion ii'ithin a brokèn ring speeies.- geneiie and phenoLJ-'pic variation across a I4rest Hinialava hi-brid zone in the CJreeni%h Ivarbler complex. FUNDING ORNITHOLOGY Claire Branston IBritishl l £1,498 (amount reqllestedl. PDR4. 1.'IJlT c'r.fir}' of Gl&s¥L)w. [,.' Ellecis of eltoparasiie prevalenLe on Lhe liLness and dei'elopmeni of Ihe Sand Mdrtin (Ripdrid fipdfidl nestinLr in drtilicial nestiiix bdnLs. Andrea Estandta (Spanish) l £1.950 Iclmouni requested) hD stud¥￿£, IiniTr'ei-sEtJ- of Oxford, Ult Gh05t introgre£sion in Norfolk Island Zosterops.. Searching for genomic remnant% nl rhe extinct IIThiie-Lhested ivhite-eye. Katarzyna Janas IP()lishl l £l,*oa lainnunt reqlle8tedl' Assi.fi&K7t Professor 13dJunct), A.fuseum andlF7Stirute of 7oology, Polish Acc7denpJ- of S(ienLets, Poldiid A riddle of rnuliiple nrnamenls.. Lhe Qireat TIL case. Two of the 5peiie5 being researched by projeLis funded by rhe BOU in 2023 Rosanne José Michielsen IDulchl1 £2,000 lamouni reoiiesiLdl FlID.stUde￿1. nf3117Tr13JRe.fe3rL-h Jii.ftitEite, PL7lJ.sh.4i3deTrTrp" nf Scie￿cE.5. LfjnR-tprin Ipgacy of Iorpst disturbance. and hrpp.ding birds in BiatL)ii'ipza Primpi-.al Forest. From Ihe lop.. 53nd Marlin Ripgrio riporiL7 Crested Guan Penelopepurpura5cens Gabriel Lopez Segoviano Imeiicanl l £1,911 laninunt requested) PosidoLtorhlresec7fL'her. y131￿'ers/dcld..I'C?o10J?C7I,4￿t0n0nlC? de MèxiLo. ..l/e.Yi('o Idenlifl'iiig ke! plani speLigS in Ihe planl-lriigii'ure nelivurk as Ihe firsl slep to conserving IrLigivorou% bird in the face of tlie e.Ypzn%ion of the 3VQC2do crop. Enriqueta Velarde IN.lexiLanl l £1.974 lamLiunt reoiiesledl Senior i"eseJrc'hei", L..nI￿'e￿sIdSd l.'ei7Cruzd￿&, J11p.¥ico Food partitioning beiii'een four seabird species in their main nesting site in the Mexican purliL)n ol the Gull ol Mexico, and indicaiion ol lishèries resuurLes 'A￿ardS liinded from £IO.000 donation received in 2022 (small grants fund) Laura Céspedes Arias declined the aM"ard, so the £2,000 allocated here was not paid oui. Brenda and Tony Gibbs small research award £cpararc to the m1( in CTibl)s ,1￿.ard {a￿-ardS lip 10 £20.000- see Pcigo 271 ￿'C are using the remainder ol the beouesL lelt 10 us by Brenda ic nd Toii5' Gibbs LO luiid

BOU Annu31 Report & Account5 | 2023121 BOU smaller am'ards for applications ￿'1th1n the parameiers of the Gibb8 beque%t coming in through our small grani scheme. One aii'ard ￿'aS made in 2023.. Federico De Pas¢a]is Ilialidl)I111,6ia Idmuiinl reouesledl Po.ftdo¢tor3lA.s.sociiie. ft31iaEI Institute forEnviroJ7meiiiJl ProtectioEI and Rese8r('h (l.fPRA). 118ly Sai'ing ghL)sts. shedding light (Jn the al-sea behaviour, risk eKpusure and icr()plastic iiiEesti()n in the enddnEered Polynesidn .£t()rn] Petrel INesolreEett3 luliginosal. In N.larch 202.3, Council 3pproved the Committee s propo%al that the fuiidinR amount available via the £mall Ornithological Research ¢Jrant scheme be raised to a mayimum 01 £2.000 Iracher Lhan £1,500. or £2.000 in e.¥eeDLional eirciimstancesl. This Lhange will be iinpleniented in rhe next round of applicatiDn% and seeks to accriunt (Dr risin￿ research cDsts. The total pfjt nf monpJ' 31'311able i-.la this scheme remains Ihe sarne. Career Development Bursary scheme The commiltee reLeii'ed Iwo appliLalioiis 16 in 2022. scheme not offered in 2020. 7 in 2019. 5 in 2018. 10 ii) 20171 and boih ivere assessed b!. Ihe Commiiiee. Council approiTed one award tQLallinE £2,500.. Akshay Bharadwai Ilndiall £2.500 lamouni reouestedl If35ters stude￿1. l￿dI31] liistitute of S1-ieNL-E. l￿dI3 More the merrier?: f.xamining the relationship be[￿-Cen struciural diiTersity ol veggiaiiL)n cuver dnd biudiversity in Ihe STh'iss Jura mountains. Pi-ujecl IucdtiDii'. Uiiiversits. ul Neuchalel, ￿￿-ltZerland uperi".i£or.' Prol. Clclra 7.emp John and Pal Warham 5tudentships The lourili and (iiial .lohn and Pat Ilarliani Studeiitship M-as aw'arded in 2022. Upddles on dll fiJur fullb. fundgd sludenighips dre pruijided beluw. WARHAM STUDENT Kirsty Franklin, University of East Anglia, UK (commenced 20181 The'Round Island petrel, conundrum Principal supervisor-. Prollennifer Gill Kirsi} provided us with her linal repori via #iheBOllblog. reproduced here.. PhDonel Alter four and a half 3'ears. field ￿ork in sDme excitin￿ places, a ￿lobal pandemic. and a ,3-month interlude on a placement Thith the RSPB. I graduated M'ith my FhD. Our 201 R IAldrhdm Cliidpni. ￿rSrY Frankjin, University of EdStAnglid, UK. As l'i'e shared on this blog before. m), BOLI-lunded PhD focused on the cnigmaric Dopulaiion of tropiLal Pterodrom,? Detrels on Rou11d Island. Nqauritius. The primary

BOU Annu31 Report & Account5 | 2023122 BOU aim ol MN. thesis ivas ro explore how indii.-idual Round Island petrels do. and don I, Yar3T in their migraior}.- journeys, and the conseouences lor Ihe conditions experienced b}, indii.-Idiials. I ￿'d3 furtlllldle tu use d lung-term ¥eLilucatur Irdcking datiisei collected b). the In£iituie of 7.oologv1107.', 7.oological fociet3' 01 l.ondonl, in collaboration ￿'1th the Mic uritiaii Ivildlile Foundarion IN.'III'FI aiid Ncltionic I Parks ancl Co)iisgrvaiioii Service INPCS.- Goi'erninent uf fvlauriliusl, as well as 2ettinE 10 i'isil Round 151and mi'self, in order to an$￿..er m}. PhD question%. These daia revealed exiraordinary levels LTrf variation in Ruund Island petrel Mi￿rat￿r}. strategies, M.-ith n]iKTfdti()ns cJverinK inuch iJf the Indidn Oce3n. I I()￿-e￿,er. we found no strong eb'ideni e Inr their unusual hsbrid %Larus or nionsoon-drii-.en sgasundl gnk'irunmgnl lu drii'e this k'driation. Rgpvdl tl-dlking uf inijii'iduals dLrus multiple Vears ShO￿ed petrels to coiisiEteiitly niikFraie to the san]e place at rou&FlIl the £ame time in con£ecuiive year£ and. despite the characteristicall) i'ery. different ocean conditions over ii,hiLh non-breeding petrels occur. petrel nighi-lime activity P3tterns were rem3rk3bly simildr and closels. tracked the lunar cycle iii 311 Cdses. .'ly main fie.ld se.asTrii nii Rfjund Island, where l in8tallpd 3 S!8teni nl time. lapse cameras. also proi'cd a Naliiablc tool for monit(￿ring breeding phcnolog!. and ncst SUCLess of trupical gruiind-nesting sedbirds. Overdll, the ivork iii my thesis has contributed t() the understandin&r ()1 mi%rat()r}- %vstetns and h()w the). form 3nd chcingc. ic S M-ell as expanding our knoi4.'Icdgc ol poorlN' studied tropical sl'stems. De%pite the mdJ()riiy of m}- PhD t, VhD. WARNAM PUBLICATIONS rcptatability of avian migraiory phenology 8 Animal Ecolo￿97 Bonnet.Lebrun, A.5.. Butler. S.1.. Cole, N.C..loDe5, C.G., LIsOVski, S.. Ruhom3un, K.. T3t3y3h, V.. & I'm incrediblv grateful 10 my superb isors lJcnny Gill. Malcolm Nicoll, Norman RatLlille, Ken Norris and Simon Builerl and the BOLI for proi'iding me with SULh a pDsitii."e dnd suppoi"tii.'e PhD experience. Pd]d Of cDurse, d bikF thdnL J'uu tLI JiJlin dnd Pat Ivarhai l ani so proud to be a part of Ihc flou fic mils, and funded Ihrough the IIFarham Srudgniship. It's exciting 10 SLg thL data gL'n¥ratLd Irum m5, PhD alread}, beinK used in neil, Lolldburdtive studies, such d5 BirdLife s relent identificdtiun uf 'larine ri}'￿-7< ys. I'b'e reall! eiijo3-ed the challeiiging Itropiccl11 naLiire ol thi5 project and hope 10 continue my involvemeni M'iih Ihe research on Round Island and these fdSLilldlin¥ petrels. Round Island petrel. bAovemeni Ecolo￿ 10 13 Palge Greene, Unlverslty of Tasmanla, Australia Icommenced 20191 Quantifying the ecological factors under-pinning population trends in crested penguins Principal supervisor.. Prof Mark Hindell

BOU Annu31 Report & Account5 | 2023123 BOU Paige provided us ivith her final report via #theROUblng, reproduced here., WARHAM STUDENT N.ly thvsis explured the at-sea behai'iuurs and ILTrraging èculugy ul Eudipivs penguin specie%, 3 Rroup nf penguins that dre both liighl}' threatened dnd understudied. Through a collection ol multi-tJxa studies, my ivork proi-.ides i'aluable insights iiilo factors inllueneing the disiribiition and loraging ecolog!. ol b'udipres penguins dLiring tlieir nonbreeding migrdti()ns', 3 critlLdl peri()d ()f their dnnual LyLle ivhiLh has sr) lar rpmainpd poDrli- studied. .4dditinnall3'. tny rpsearcli cniitributps neTh' knoi4-.ledgc on thc nonbrccding migrarions ol five ludypics penguin populaiions from the Austrdlasidn SubdnldrctlL Isldnds, inLluding erect-Lrested penguins, i%.hiLh had preiwiou%li' nei'er been tracked. Findlls,, mi. the%is ini'estiEdted the i.-ulnerabilitj of some popularions ol ludJi?iCb penguins 10 anticipaicd changcs in the marinc environment. Our 2019 Warham Siudeni, Paise Green, hai.-e published t￿0 papers froin m>. Lhesig. I4Thich I pas£ed i4rith Ininor corrections. ineludin£'. 'The role ol alloehrony in influenLIn￿ inLerspeLifiL dillerenLes in fora£in£ distribution diiring the noiibreeding se<lSQlll betweeii Iwu LongeneriL Lrested pengiiin taxa Icjreen et al. 20221 and 'Poie.ntial lor redistribution ol post-mouli habitat for Eud3-.1)ies pènguins in Ihe SL)Uthern Oeean under lulure climate conditions (Green el dl. 20)311see side Pdnell. My Ihesis. lor the lirsi lime since 11-'arham s studies in Ihe 19iOs. hils lilled Ic complemeniar! knoi4.l¥dge gap ol where some of these same popiilations EO diiring their nonbreeding Inigratinii8 ￿'hen Ihe3' 3re 31 sea and by and large Unfjbser￿ab1e to researchers I￿.-IthoU[ IraLking dek'icesl. To achieve this. l iised a comprehensib'e Iracking dataset nbtained from geoloeaiors - small Ingging deNices. which esiiInale location based on recorded light lei'els. N.'ly liope is th3t I have demonstrated the pou'erlul porential ol small data loggers. attaclied ro birds, legs. in advancing our undersianding ol migraiori. bchaviour and lis imi)licaiions lor conservaiion and Llitnate Lhanxe resedfLh. Further, despite the ii'urk beinx presented in tw dirnensions. l aiined 10 tell Ihe slor}- ol the lour-dimensional exploration ol the space. Lime, depth cind oceanographic s}-siems eyploited b5. these penguins. Thus. tDgeiher m!. dnd Th'drhdm s studies, thliugli 50 yedfs dpdrt. hdl'e nidde d si¥niliLdllt cnntribuiinn to rpitilyinR the lack nf pcnlngical infnrinatinn nl Eudyptps pp.nRuins vhii h Stonehouse stressed in 1967. So. l0110I4Ting in the looisteps of John 11,'arham. I like tu think we ve full i irile dnd hupg that he M uiild hdie begn delighi¥d tu ee ￿'here the Eudypte.s penRUlI1￿, that he %tudied intricatel), lor over ten ￿'earS, migraie iu ￿'hen at sed. WARHAM PUBLICATIONS GreeD C-P, Ratcliffe N., Mattem T, Thompson D., Leo ￿l-A.. Woiherspoon S.. etal. 2022. The nonbreodingsoason beivooon Mo congoneric Ire5ted penguin taxa. PLOS ONE 17121.. e0262901 one 0262901 Green C-P, Green D B., Ratiliffe N. Thompson D., Lea k.1-A.. Bayli5 A.M.M. ei 31. 2023. Potential The relei-.ance DI these fiiidinRs eYtend% bes'ond ecDlo%ical theor! and climate change science. L'udJpte.f penguins are charisinacic and icoiiic creatures. lind my research pro%.ides LfiLical insighis into their behai'ioiir and siir¥'ival. li can also help infDrm cnnservation and nianageinent elfnris tr) prfjtect these species, especially thnse listed a% Vulnerable and Eiid311£ered. By uiiderstandin% their moi-.enientE, li'e can develop stralegics io saleguai-d their habitats and ensure their long-ierm suri'ii.'dl in d fdpidl}' chdllLTillLF tndrine eni-.iriJnment. Eudypies pon8uins in the Southorn Ocean under future climate conditions. GlOtr￿1 Chang Biology 29131648-667

BOU Annu31 Report & Account5 | 2023124 BOU Relleciing on my experienLe as a Phfj student. I musi say it ￿'8S a challenging yet immcnsel}T rewarding journcy. Conducting rescilfLh on such a unique and enigmatic riJup ()1 dnitndls ￿'d3 d privilexe. It reqiiired co)untle35 huurs uf trdcLinx ddtd processing. an(I1)'SlSi ￿1nd fIeld￿Ork in soine of the most remote and beautiful places on F.arih. It was ci collsLcint learning process. ic lid l am gric telul for the support cind guiddnLe uf m! ddi'isurs dnd Lolledgues thruiighoul this ￿nded￿'or. WARHAM EVENING One aspecr tliat signilicantlN' faciliiated Illy research was Ihe AOU Th'arham seholdrship I reLeik'ed. Resgdflh SLhularbhipb plab. a Dik'utal role in eiiabling tudent% to pur%ue their academic and re.%earcli g()31s. Ilnl()rtun3tely, the maj()rity (Jf my PhD M.-as during COiTid and due to coi-.id related re%LriLtion£ l Lould not attend as tndn! LunfgrgnLes ds I ￿'Vuld,1..¥ liked. dnd w'ere restriLtgd Irotn duing the lull et ol fieldm-ork tliat had nriEiiially been planned for. Nonethele￿.￿. the BQU 11,'arhiini f cholarship proi'ided the linaiicial support iieeded io attend one in-person conference (the Inlernacional Venguin Conference held in N¥iv Zealand in 20191. purcha%e frjr field￿..￿rk. gn Trn 3 lieldtrip tD the Bounis. IEland%, Neil, Zealand, a% vell as financp p.£sp.ntial ruiining cnsLS. 11-'ithnllt this suppnrt, rp.sparcli ￿.￿ll[d have been Lonsiderabl3T more Lhallenging io carry oul elleLliNely. Nqorcover, the scholarship was not just about li113ncial assistance. It represented recognition and belief in tlie value nf ni3, research and its pDtential impact. It niotlY3ted me tfj strib'e for cxcellcncc and pushed mc to contribute mcaningfull!. to Ihc lield ol pcnguin eculug!. Beiiig Pdri ul the IN.IAS N.Idrine Predator resedrch lab Vvith the bdcking of thi% B(IU Ivarham %chTr13rship alloii'ed me tTr focu% nn mi. re%e3rch. workin together ii'iih ivorld renoii-ned scieiiiists. ￿'IthOut the burden ol linanci(?l Loncerns. .liiih WdS instrunienldl in dLhieving the depth diid breddih ul findings presented in my thesis. On 2 November 2023, we held an online W3rham evening lor BOU members During the Zoom event. chaired by BOU President Graeme Buch3ner), members enjoyed presentaiions from Warham siudenis Kirsty Fr3nklin, Paige Green and Emile Br15s0n-Curadeau, and an Iniroduction 10 Ihe lourih Warham proiecL by Rohan Clarke. Members had Ihe opportunity 10 pui questions to the presenters and learn more 3boui john and Pat Warh3m, Ih3nks to 50rne reflection5 provided by Paul sagar, a former siudent oflohn's, delivered by Graeme. The evening wa$ 3 wonderful way 10 celebraie Ihe legacy ol the Warhams and learn more about the lascin31ing siudentships they have generously funded. In LunLlusiun, tny PhD juui'ney Ihruugh Ihg w'urld ul Eudpptvs penguins hds bgen bo)th enlighteninLT dnd lullilliiig. The tlldiur lindin¥s frutn iny research hdl.-e prdCtICdl impliciiiiolls lor tlie conservation of Ihe£e remarkable birds. sheddiiig light on their migraLion paiterns. nich¥ parLilioning behaiiors. and rgsponses Io Llimaie Lhange. As a reLeiit PhD Kradiidte. I xfdtelul dnd privilexed fur the sLhuldrship Ihdl supported m}. research and for the opportunitN' to coiitribute to nur uiiderstaiiding ol these LharisinaiiL inarine predaiors. Emile Bri550n-Curadeau, McGill University, Canada (commenced 20201 Foraging behaviour of King Penguins under extreme climatic events Principal supeNisor.' Dr Kyle Ell.olt In P.mile s end of year comniunication. he wrote.. The end 1% near for tne1 At lea8t w'heii it cntne% to m}, life as a 8tLideiit...

BOU Annu31 Report & Account5 | 2023125 BOU In April, l ￿.111 be submitting niy Lhesis. What a journeyl In the last year, I ITe had Lhe timc 10 conLentrale on m}.. wriliIig. and Ihrce ol my papei-s got published. My riJudest.' a publicati(Jn in Glubal change BiL)logy ii."hich discussed the diflerenLes in sensitivity to clim<iie change thai dillereni populations from the same species (here King Penguins) C20 years nf Inraging and breeding data Irnni t￿.￿ large Lolonies ol King Penguin, and l shLTrM'ed Ihal. despilè beii)g neighbuuring ciJlunies, the culunies reacted very differently to climate chanRe. Indeed, due tu difle.rence£ in bioge.ograpliic feature.s %urrounding Ilie C￿.0 L-olonies, one population 'uuld ￿u[ler Irum climdlg Change. Ivhilg the L)th¥r on¥ ￿.￿Uld benefit frum it. WARHAM STUDENT As MN. Phl) is Loming LO an end. I really i4.'ant 10 Ihank the BOLI ￿"hich made Ihis wh()le project pD%sible. The support that the orgdlllZdli()n hds giTren me hds been huEe and I thiiik it is fair tr) sas, that the niitcTrine nf that prnject ￿'2S IrLiI!' beiieficial for King PcngLJin rescareh. Throughout my PhD, I have publishcd four pecr- reiiewed Pdpers, PdrtlLIPdted in three interndtiondl Lungresses. dnd mdde severdl contribuiiuns tu populdr scieiice. Soun, I will liaiwe lo ihink dbout ivhat the next steps for me will bo. .4 Ccireer ic s a seabird biologist? Il'ho knoiv,5. Our 2020 Warh3m Student, Émile Brisson- Curadeau. McGIll University, C3nad3. John Lamaris, Monash University, Australia Icotnmenced 20231 Recovering the critically endangered Beck'5 Petrel Principal supeNisor.' Assoc. Prof. Rohan Clarke WARHAM PUBLICATIONS Bri550n-Curadeau, É., Handrich, Y., Elliott, K. H., & B05t, C. A. 2021. Aiieleromeiry predict5 prey- Firsil!, a special thank i'ou goes to John and Pat Iwarham. and Ihe t40U. lor funding this PhD resedfLh pi'uieLt. .41su, thdnk }'LTrU lu tsiipgri'isur J tedtn Ruhdn Cldrke, Richdrd Fiiller dnd Jerem}, Bird - fur kFetting me budrd the Beck's Pelrel tedln. providing me with this research opportiinii}'. Apren0d￿es patagonicus. M3rine Biology 168-. After d lung Wdlt lur the pru￿￿551n￿ uf niJ' student i.-isa. I WdS dble tu drrive in Melbnurne On the 13tli ot Deiember. Whilst this did align with the uniiTersity shutdoi4rn lor the Chrisimas break, il il'as Lonvc'nient lor me as il is suinmer in Melbuurne ￿"hICh helps me tu dLLlirndti£e dnd settle iii. I dtn dlso grdtgful fur Clarke s Lab teani fnr niaking me feel M"elcnine alld lielpinR me settle in. Brisson-curadeau, É., Ellioii, K, & BOSL C. A. 2023 cOntr￿s[lng botiom-up &ffecis ofwanming ocean on two king penguin popLlatiOns. Global Change 8iology 29141.. 998-1008. Bris50n-Curadeau, E., B051. C A.. Cherel, Y.. & This siudi, is aimed at recovering the Critically Engendered Beck's Pelrel and M ill focu% nn locating a breediiig colons- and Studying the %pecie.s ecDlTrg}'. It is iinpnrtant that i4re locale the Beck's Petrel Iiesiing groiinds. Ic nd cissess threats 10 the popiilaiion. so that beiier conservation SLraiegies can be dek'eloped 10 protect the pecies. The apprDach to 3chieN'ing that will be tlirough the following prnpn%ed key Lhapier8'. effort rather thèn diei when faced with poor Bri550n-Curadeau, É.. Scheffer, A.. Tr3thaD, P.. Roquei, F., Coiie, C., Delord, K, & Bosi, c 2023 1nvostigaiing-.wo consecJtive caAsirophic il FrdcA'Eng thtt distiJbutiUJ7 telTe5tridJ i.E51t5 uf BecA- s Feri-el. r.tnplo!'ing methods dei'eloped in 2017. ￿-e currenil}' hai-.e seven PTT 5atelliie lags ai'ic ilable lor deplos'ineni. These ￿.111 increic se the exisLing sample size lor

BOU Annu31 Report & Account5 | 2023126 BOU analy8ing seasonal moiTements, assessing overlap ￿'1th threatening at-sea processeb and elucidating additional brceding locations. 21 hdbitdt suitdbllitp" niudelJi￿Y. L"sing Sdtellite trdcking ddtd combined with eniTironmental vari<ible%. ￿.-e ivill build a model prediciing siiitable breeding habiiaL lor BeLk's Peirels iii Ne￿-. Irelcind ic nd poteniiall!. elseii,here. This outPUL rould xiiide further on-%roiind searLlies fur breedin2 birds. 31 phe￿OI0£Y Jiidbieedjiig bJoJoKy of BecA-.f Pe£ieJ.s. LlsinR tracki11￿ data, shore- based nbserb'8Linns aiid researih at breeding cnlnnies. this iliapter ￿111 prnvide nei4.' dnd Lomprehensik'e daia un iLilun!' aiienddnLe. liming and shill durdliun of incubati()n, chiclo rearin£ dnd fledEinE. 41 ￿e(.k s Pelrel st&tilf 8nd fhreais. Coafial boai-based obseri'aiions ￿.111 be done lu i omplete d mdrk-reLdPlure populdliun gslimdlg using ddtd Irum sdi¥llilg- taKRed individual% and 8imultaneous raft count% in Eilur Bay, Ne￿. Ireland. In addition. use of remoie monitoring technologies at a colons" iii souiherii New Ireland M-ill colleci data on breeding siiccess and invasive species impacts. WARHAM STUDENT Our 2020 bvarham siudeni.lohn Lama￿. Mon3sh University. Australi Gii.-en the very reient start. m}. fncus tD date has been on the fnllnwing.. 11 Literdtui'e This rei".ieii" w.ill suintndfile dll Ihdt is know'n abuut the Beck's Petrel t() date and ￿.111 ensure latn ￿'ell placed for the first HDR Initial Project Rcvicii, milestonc SLhcdulcd lor the mid-Jiine 2024. 21 Resedr('h pro¥rRm dndpjdft.. Notii'iihsidl)ding Ihe proposed ouiline of mi" four d&ltd chapters, ds ouilined above. I have begun ￿'￿)r￿]￿R ()n a Tnore comprehensive research plan thic I Ii'ill provide Lhe Iramei4.-ork lor all of m), researLh aetivilies focused on Beck's Petrel. I ha%."e mèl one-on-one with ms, superi".isors d nuinber ()1 titnes SillLe comrneniing in inid-Deceinber 202,4 dnd hai.-e a meeting scheduled M-lth tlie eniire superb'isory team in late January to discuss and i)rogi'ess Ihis further. 31 P&pu& Nes1 i-ebe,?rL'h perniirb.. I w'ill need research permits 10 conduct the fieldTh-ork in Ne￿. Ireland, PNI". l ani liai%ing with the Conservation F.nvironment Protection Aiithoril3' ICF.PAI in Papua Ne￿, Guinea lor Research Permils. ProRress 10 acquire Ihe Rèsearch Permiig has bèen Dnsilive and I m hopinE io Eet feedback from LEPA bi. the end ol Januars.. I liai.'e alsn been working M'ith Iny superi-.isory tcatn on this. as collectively i4.ill draft rhc required permil ai)pliLations. 41 A￿lj71￿/ ethirs.. 11 hile liaising with CEPA fur permiis tu cuiiduct resedrch in PNG, the ream is also ￿'.01-king on the Animal r.thics submission to Ihc N..lonasli Llnii'ersily Animal EihiLS Lummitree. 51 CoinpJetJon of HDRPrLJ¥r5￿ CoEnpylsorF' Luur5es.' As 3 part ul my Higher Degrees prograin tliere are several conipulsory courses required LO be complered i4"Ithin a month from Lhe dale ol enrolmeni. I have Lompleced three ol these Luiirses. l-he IdSt uf these LQ)urses is scheduled for the end uf Februdry 2024. It is unli, rhe beginning ul m5. res¥arLh journey, and I kno￿.. thdl sedflhes fur Ihe Beck's Petrel have been challenging, and thnse challenge8 remain. De.spile that. I am exciied and looking forward to the adventures ahead.

BOU Annu31 Report & Account5 | 2023127 BOU Brenda and Tony Gibbs bequesi RECORDS COMMIThEE 11,'e receib'ed and assessed 33 applications. The combined scores and comments Irom Commitiee members ivere used for Ihe basis ol the on-the-das, disLussions at a ineeting on 21 June 2023. Chair Dr Alexander Lees Imanchesier Metropolitan Council approvcd a single a￿'ard of £20.000'. Drlame5 Gilroy luntillune 20231 Ariun Amar l£outh Alrical Assv('Idic, Ri'ofc'ssvr. fitzPdtriik Instilijie of African Ornirhtslogj., South Africa ImpaLlS ol kntilieial Lighl at Night (ALAN) on Iwo nociurnal birds- a na[￿al experiment triE£ered b}, the colldpse puwer suppl!. In South Africa. Secreiary Dr Chris Mclnerny Iuniversity of Glasgow) Members Records Committee 80U.ORG.uKJBRl￿s￿-Ll5TI Mr Ross Ahmed INorihumberlandl Ifromlu 20231 The Recnrds Cnmmittee is respr)nsible fnr maintaining the flritish l.Isi. the nlficial list ol birds rccorde(l in Britain. Dr Pierre-ADdre Crochet (French Naiional Centr@ for Scientific Research ICNRSII The Commitiee met [￿'lee Iremotelyl during Ihe >'ear with other business conducted b}. email. Mr Paul French IBBRC Chairl 1r Mark Golley (Norfolk, U Ir Mark Thoma5 IRSP61 Jame% (Jilrn}' retired as a member Df the Cntnmiitee in July 202.8. James served on the ComtniiLee since ?01 O and as Chic Ir from March 2019. and w'e eytend our gralilude io him for all his hard work SDa11ning 13 Jiears. Alex Leès siepped inio Ihe Chair rnle from Juls". 202.'13nd ive ii'elconied Rnss Alimed as 3 nei¥ meniber Ross is ali experienLed birder wilh a particular passion for analvsing bird migration daia. and he is already Lontributing his exLensive knowledge io Lhe CommiLLee. Dr Leila Walker, BOU COO 80URC CATEGORY F SUB-COMMITtEE IBOURC CFSCI Drloanne Cooper Proflohn R. Stewart Dr Dal& S&rjeanrson Changes to the British List The BOURC'ts o6ih Report ￿"d5 piiblished in Jdniidri. 2024 dnd Lovers Ihe perilid October 2a22 to September 20?3 IIBI.f 16fj.' 348-3*21. Thi£ announced a iiumber of changes 10 Categor3, A ol the British Llsi. incliiding.. BOURC con5uliant5 Iielp CJUII Lsru.s - %pecies added to the List. Leasi Bittern IA'obryLhiis cA-Ilis- species added to the List. Sulphur-bellied Il'"arbler Fhp'llLJJL'UPU5 ¥1-15vuliis- speLlgS ddded lu Ihe List. The addition DI the Coinnion Eider %ub8pecies .foniJreii& nTrnJlE.s.fiin& faerocenstss cind the British and Irish endemic Grecnlinch sul)si)ccics Ghloris hjoris harri.soni in accordance ￿..Ith an earlier iieraLions ol the IOC M,'orld Bird './/￿'￿'￿'.￿".0rIdb1rdnaMes.nr, Mr Steve Dudley IC3tegoryCI Dr Bob McGowen, National Museums of Scotland Imu5eum51 Andrew Owen. Chester Zoo (captive bird In clddition. the rcleasc ol Ycrsions 13.1 and 13.2 01 Ihc IOC Th'orld Bird List rcsulied in a nuniber ol chdnges to the British List, as detailed in the 06, Report. £ubsequcni to the piiblicarion ol the 56, Rci?ort, rhe CommirLee c?nnoiinced Ihc reinoiial of Lesser Shori-IcTred Lark Al&ud2ld riifes('eJTr5 Iroii) Category A of Ihe

BOU Annu31 Report & Account5 | 2023128 BOU Rriti8h l.ist Ito be included in the J7ih Reportl. ADDITIONS TO THE BRITISH LIST Alsu, It m.ds noted thdt through uvei"sight the IOC split DI Tibetdn Sdnd Plo)ver Char&drJus atrJfroF7s from l.e£ser Sand Ploi'er C. moF7golus Ire-n<inied Siberian Sand Plover) Thcls 1101 included in Ihe C<iiegors' species totals iii the 06, Report. Iii total, these clian£es 10 Llie Briti£h List, loRether ￿-1th taxonomic chall￿e8 in line 'ith IOC iaxnnnmy (derailed in 113lb Ifi4'. 929-9311 bring the ioial tn fi3,3 species as at 31 DeLen)ber 20)3. Also in Ihe Jf6 Repnrt. the Commiitee outlined it.8 approach to Lryptic bird species. indiLdling thdt il wuuld Idkg d pfdgmdtlL ldS¥-b￿'_Lase dprjruaeh to dSSgSStnent uf -%pecie% ii-.here it is ni-.er￿']ie1￿inKI3' likel3, thar 3 record pertains to Trne cr3'ptic specie£ lind noi others in a complex le.g. due 10 i-.agranc! likelihood linked 10 life history Iraitsl. In the same report the Coinmitlee also indieaied thai it M'ould consider submi%%inn% of record% ii'ithnui 3 human fjb%erver le.g. record% frnni pas%ii.-e 3CQU%tic rpiordpr5. c3me.ra traps nr traikinR datal and thaL this i¥ill oiillr nn a iasp-b}'_iase. basis. ￿..ith submissions reouiring as much obserbaiion metadaia as possible. Committee recruitment Neiv CDmmittee Member￿ continue tn be recruited via public call% lor nnminations. For the 2024 round ol CominiiLee nominations. Ale.x. in his role as BOURC Chlc Ir. tligeiher m.ith Ddw'n Bdlmer. penned a LuntributiDii uii #theBOUblux alknu￿"1edKITrx BIIURC'S 13ilure to recruit leinale member% and a%king what can be done about it. The blog hopes to highlighc the issue 10 the Lomniunii} and encourage people 10 niTrinindle ii-()nien l()r the C()Inniiltee. 351 Biitern Ixobrychu5 exi115, admitieG IC the Links with other groups The Coinmittee niainiains close links ii'ith the British Birds Rarities Committee IBBRCI. l-hè BOLIRC Sècretary Lontiniies to s%'ork close1￿. with BBRC'S Sèerètariat aiid ()ther European coinrniitees, and close links are rn3111tained with Ass()ciation ol F.uropean Records Committees 1.4r.RCI. BOURC online intranet The Conimittee operates an online intranet site that Is used lor the £iorage ol images and documents to assisi M-ith its wurk. Sulphur-bellied Wdrbler PhylloscDpusgriséolus, admitted to the British List In 2023.

BOU Annu31 Report & Account5 | 2023129 BOU Acknowledgements Membership The Union would like to extend its thank5 and graiiiude 10 Ihe followingwho have 355i5ted wilh Ihe m3ny BOU aciwitie5 throughout theyear.. At the end uf the J'e3r our tutdl n]embership stoud dt 1,08911,017 3t 31 Dec 20221 comprising 181 lull members l 1 21 Ic t 31 Dec ?0221 cind 308 reducecl raie subscribers 1296 dl 31 Dec 20221, tndde up uf 277 edrl}' Lareer resedrLhers IECRsl dnd 31 fromllibing in I0￿._and-MIdd1e-ln(Ome countries. All those member5 01 Council and our and deliverour Mde rang& of actwities-, 44 niembers sent their l()rindl resigndli()n during the }'edr126 in 20221, dnd CiJuncil noted. ii'iili sadness. the InlloM'ing deaih£.' lJr Norman .4rlDii, hqr N.lanuel Orobitg Duarrc, Mi- Dundld GreL'nhal¥h. Prul N.likL Ilari-is. Dr £iisan I la>'som, Dr Nei.'illc Skinner. Raurie Bowie, Richard Fuller,lenny Gill, Rebecca As ci-.er, ￿'C remain extremely grateful for the continued support ol our membcrs. Richard ￿le lon behalf ofthe Alexander Library. Financial review revie￿$., Graham Appleion, Honorary Treasurer The BOU made a loss of £3.140 in 2023, M"liich is lesb Ihan predicted. -l-he most sigynilicant variances will be di%cus%ed beloi¥. .4% indicated 13%t l'ear, Council has been setting budget.s that are de.signed to be negaiik'e. by invesiin% money in Ihe liiliire ol nrnitholoR}-, e%pecially throuRh %upport for early- career ornitholo£i£t£. Graham Allen. Farh3thlabeen. ADdrea5 Peiersen, Geneviwe Richard5,lanaDs.' sudarshon.lo Wood 3nd colleagues 31 Wiley, for Andrew Howvood, Adrian Morris and colleagues al Henpi Ling Lld lor providing member print The BOU 113s done ivell to we3ther the long-standing Covid cri515 but there is still ame llncenainty ab(Jut inc()me generation due to ch3llkFe% in way8 ()f ￿'orkInk Pll.St- CoiTid. Many no￿, think more carefull} about Ihc carbon cost ol crai.-cl ic nd the healrh LunsequenLes ol Lo)nferenLe attgndanLe, espeLially flir Ihuse ￿"hO dre mure vulnerable. A% ynu will have read in Ihe Pre%ident'8 repTrrt, much thought h3% been given LO neiv models lor FgOL meetings. are fortunate Lo have annual income fr(Jni Ibis and money in the bank to trial ne￿. initiaiipes. career researcher award-, NILTel Crocker, Rich3rd Price and Stephen Rum5eyforthe r excellent monogement of the Union'5 investment portfolio.. Am3nda Tra5k Izoologiial Societyof London, Ptslandl, Ferran Sayol (University Colleg London, UK),lelmÈr kmplonius (Universiiy of Edinburgh, UK) and Emily Siwmonds (Norwogian Changes of personnel Having helped us IL) negoiiate a new publishing LoniraLt with NN'iley and pruk'ided support for Leila tlirough her first dnnudl report dnd dccounts. .£tei.'e Dudle}, s call- off contract ceased ai Ihe end of h.'larch 202,E. As a consequence, sialf co.sts i4rere low'er in 2093 than in 2092. work preparingthe programme for Ihe arnual conference IEvDIUtIOQL7ryre5pon5￿).' Bryam Agui13r, Ondrei Belfin. Sarah Binnie, Ryan Durin￿ Lhe l'ear. our three Inve£tineiit Tru£tees indicated that they felt that it was tinie 10 niakc changes, alter deLadcs ol service. lfye are Nery graiefiil to RiLhard PriLe. Nigel CroLker and Sièphen Riimsey for stewarding oiir iniTegimentg so ￿,1$e1￿. Three neM". IniTe%tnient Tru8tees have been recruited to take over, once the accounts for 2023 haNe been linalised. Hannah Hereward, Triin Kassiku, Nnge13 Sockhill, kmaniha Wong Topp, Qioi Yang and our conferences, Conu.

BOU Annu31 Report & Account5 | 2023130 BOU l am due to lini.%h my second term as Hon Treasurer in spring 2020 and it Th'ould have been good to hai-.e siarted the handoler b! rccruiiing a Treasurcr Elect lo CDuncil in spring 2(J24. 11-'e dre still tr}'ing tu find sutneo)ne but, shuuld w.e Idil, I dm prepared 10 serve for a ninth l'ear, through to the 2026 .4GN.l. subject 10 the approval ol members at the 2025 AGM. Acknowledgements CONTI. Wouier Vonsieelanl IUnwer51tyof Groningen, Ihe Nether13ndsl.105e Ave5lUniver5ityof Gibbs Investments I reptjrted last }'ear Ihat pal'nients IrDm the Gibbs Fund were beiiig made frnm cnre funds, in Ihe huDe (hai ihe ipaliie (Jl the iiii'eslmenls in ihe ilmil5' Bdlanied Flind lor Chdrities could be recoi'ered. An initial investment ()1 £1.30,000 Vv'ds mdde in edrls, 2020. just before CoiTid hii and before the uncertainties associirf ted i4rith Rus£ia invdsiun uf Ilkrainè. The i.'alue had drupp¥d tL) £117,9 17.22 by 31 D¥cemb¥r 2022 and then dropped to £112,32f).25 by the time that the Fund M".a% clDsed b). Edeii Tree, the fund maiiager%. in September 2023. The Iiivesinieni Trustees ￿ere reluctant 10 reinvest the mone3', gii'en uncertain medium term prospects. and £112.326.95 ￿'aS credited to the BOU'S CAF accouiit. as a clieque. of Easi Anglia, UKI, Elham Nourani (Max Planck Knightluniversity of Alberta, Canada), Camila Gomez1SELVA, Colombial. Fengyi Guo (Princeton Univer5 ty. USA), Bryani D055man (Georgetown Univer51ty. USAI. Yachang Cheng (Sun Yat-5en Univerrity, Peoplds Republic of Chinal. Say3m Chowdhury IUniver5ity of Gii-.cn thai Ihc Gibl)s fund is a legacy, Council has fcli morally obliged 10 mako up the IDSS oli investments1£11,6 13. 1 51 dnd tliis is reflected iii the dLLuunts lor 2023. The new Investment Tru%tee.% ￿111 be 3%ked t() think about ￿hether there is a Conior of Mongolia, Mongolial fortho planning and deliveryof our GlobalfvoJ5 auiumn conference.. sensible mediuin term invostineni route that ￿-.1]I holp rccob'er some ol this loss. Daniel B13nco and Ch3die Dougla55 31 Dougla55 Digiial for mainienance 3nd dwelopmeni of the BOU website., Tlie peri()d ()f the investmeiil ()1 the Gibb% mi)iie}' Vvas unf()rtundte. bor c()mpdris()n, 'e realised a£sets in che M-'arham I",uiid at the same time as ￿-e bought ini'estrnents for Lhe Gibbs Fund. This liming ￿aS èxcelleni. alloN%ing us Io SUPDor( a loiirlh PhD studentsliip, ￿,he￿ the origindl budget Iidd been IDr three. Maria Roger$ and the ionference sialf ai the Lniversiij of Noiiingham Conferences lor Reviews in 2023 Andy Mu5grNe for coniinued help with I hi8hliglited the contiiiuiiig drop in Inembership number.s in ni3, repnrt Dn Ilie 2021 accouiiis cind the 2022 Annu<l1 Report iiiclude(I nieniion ol two neiv revieii's. looking dt membership relentionlgrowth dnd huw BOLI shuuld d￿￿'eL￿p it5 LunferenL programme laiid income %treaml in a po%t-CoN'id ￿'nr]d. Member%hip number ini reased marginall5-' in 2023 biit. because nf cliclnges li'e made iii 2022 rn the ii'ay that reTre￿"dIS dre dlluLdied, inLume dropL)ed sli¥hil J,. During the s'edr under review a third str3nd to the I"eb.ie￿. emerged, as Council considered a I"efresh of the BOU'S strateg). M-ilh strong leadership from the expanded Management Group, there has bgen progress in all thrge areas, as yuu w'ill in the report uf CuunLiI from Gragine Buchdlldll. records comrritiee5 acr055 Europe Lnder the Record5 Commillees IAERClwho have B55i51ed BOURC duringthe year, Karon Kragesand Thomsen ai Kovsied & Skovgsrd, Variations between 2022 and 2023 We apologise to aryone we have in3dveriently omitted. HiRher interest rates contributed to an increa.se of 38% in inconie from ini-.estments but inflatinn had a negative cffcci on most nl Ihc BOU'S oiitgnings. ConlcrcnLc costs In 2022 w'ere infldted by the Ioss ol d deposit on d Ldiicelled Lonference ￿'hICh explains wh). 2023 costs were %iEnilicantl}- In￿er. Expenditure ()n charitable actlb'lCiL'S il-as relaiii'el}' low in 2023, as Icss monc'} ￿-.aS spent on Il'-arham Studentships, in linè with the schedules of payments. PubliLation income remains

BOU Annual Report & Account5 | 2023131 BOU strung dl £118,906, LOmPdred to £108.752 in 2022. There ￿.85 further reduLtiun in the iwalue of BIIU'S long-term ini'estinents during 21128, in line with market trends. Looking fomards 10 2024 The budget prepared lor 2024 includes exira resoiirces lor conlerences. as ￿'e trial iiew. enKdxemenl nietho)ds, dnd ￿"e ￿"111 need to invest mure in mdl'kelinx dnd promotion. after a period of restraiiii. Th'e expect 10 make a loss of about £24.000 during ihe l'ear. ii,hiLh is in line ￿..ith a strateg>. Ihai sec's us rcduLing reserves 10 £350,000. Lnrestricted reseri."e5 Stood at £642,362 3t the year end.

BOU Annu31 Report & Account5 | 2023132 BOU Responsibilities of the Trustees The N..lembers of Council are responsible for prepiiring the TI￿Slee5, Report <ind Ihe financi<11 stalemeiils in accordance iiith applicable l<iW and Uniied KintTdom Accouniiiig S11< ndard% (United kingdom CJenerally.4Lcepted AccouniinLT Praciicel. The la￿, applicable lo chariiie% in England and Nl,'ale% and in 8coiland require% Ihe l.lember4 of Collncil 10 prepdre findncidl ¥tdiemenis for edch findncidl yedr which give d Iflle dnd fdir iriew ol Ihe state of affairs of Ihe charily and of Ihe incominLY resources and applic1¢ lion of resouites of the charity tor Ihai year. In ptepaiing these findncial %Utrmtnls, Ihe N.Itmbers of Council are requiird to.. s¢lecl 5Ultdble ac¥ounling policies Jnd thvn apply Ihem consisteiiily., vbseivc thc mcihod5 and pnnciples Iti Ihc Charities SORP: tnakc iudgemtllls and cslirnatts that aic Itasonable and piudenl.. stalc ￿,hether dpplicdblc aciounling slandai-ds hdve bcen followed, subKcl to any arci-IAI dcpaiturcs disclosed and cxplaincd In Ihc Financial statcmenls., ar.d prcpare the financial slalements on the goin£ ioncein basis unless 11 is Inappropriate to prcsumc thai the charilv will continue in OLKralion. Thc N..Icmbcrs of Council 1( rc rcsponsiblc for kccping sufficiunl accounting rLYords that disclose with rcasonablu <1CCUI?C) any limc Ihc tin<1ncial wsiiion of thu chi1rily (1nd cn<iblc Ihcm 10 cnsurc Ihai the financi<11 gtalemenls Lomply ivith the Charilieg Act 2011, the C￿￿'11Y (Accounlb and Rewrlsl Reguldtiong 2rJ)8, the ch￿tte& and Trnblee Invesimenl Iscoildndl Act 2005. the Ch<iriiies Accounis (Scotlandl Regulations 2006 las amended) and the provisions of the ttllst deed. They are also responsible for S<1feEuardin£ the asseis of the ih<irily and hence for iakin£ reasonable steps tor the preveniion and deteciion ol liiud and oiher irregul￿ltie9. Stall i'emllneiiiion 18 reviewed aniiually in I￿lURry by the principal officei'.£ (Presideni, Honorary reL%urer and Honorary secre[￿-Y)..lThe deciiion on ivheiher 10 make a p&y award ]% coniingeni on affordabilily and Ihe 12-monih averaile CPIH foi- Ihe preiious calendai year. Benchmark-ing of pay and pen%ion ag¥ain¥l compai-aiors iiiihin ihe %atne ¥ecioi, incluJinb the ￿a]n avian reieaT ¢haTilie¥, is underuk-en ￿lIod1¢allY dicordillg 10 availability alld affordabilily of infonllaiioll. Approved by the Coullcil on 6 March 2024 and si¥ned on IheiT behalf by". Dr Graeme Buchanan President

BOU Annu31 Report & Account5 | 2023137 BOU BRITISH ORNITHOLOGISTS, UNION STATEMENT OF FINANCIAL ACTIVITIES FOR THE YEAR ENDED 31 DECEMBER 2023 Currentflnanclal year Unr@stnct?d funds Restritted funds Endowmènt funds Total Total 2023 2022 Notes Income from.. Donations and legacies 38,052 38,052 47,967 149,262 28.492 149,262 34.601 129,240 25,116 Investments 4,453 1,656 Total income and endowments 215.806 4.453 1.656 221.915 202.323 Expendit Raising funds 51,869 51,869 57,738 125,561 43,647 169,208 196.029 Total expenditure 177.430 43.647 221.077 253.767 Net gainO11055e51 on investments 12 15,9D31 1,9251 13,9ni Net Incomlnglloutgolngl resources before transfers 32,473 139,1941 3,581 13,1401 Gross transfer5 between fund5 4.064 14,0641 Net movement in funds 36,537 143,2581 3,581 13,1401 Fund kl3nces at I lanuary2023 605,825 314,449 153.658 1,073,932 1.175,277 Fund balance5 at 31 December 2023 642,362 157,239 1,070,792 1,073.932 The statement offinancial allivities include5 all gain5 and los￿ recognised in theyear. I Income and exp@nditure Is derKved from continuing activities.

BOU Annu31 Report & Account5 | 2023138 BOU BRITISH ORNITHOLOGISTS, UNION STATEMENT OF FINANCIAL ACTIVITIES ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Prlor flnanclal year120221 Unrestncted funds Restrirted funds Endowmènt funds Total 2022 Notes Income from.. Donations and legacies 37,967 10,000 47,967 129,240 19.321 129,240 25.116 Inve5ttnent5 4.323 1.472 Total income and endowment5 186.528 14.323 1.472 202.323 Expendit Raising funds 57,738 57,738 139,690 56,339 196,029 Total expenditure 197.428 56.339 253.767 Net gainOllos5e51 on investments 12 139,6441 149.9011 Net In¢rJmlnglloutgolngl resour¢es before transfers 150,5441 18.78SI Gross Iransfers between funds 5,633 15,6331 Net movement In funds 147,6491 18,7851 Fund ￿15n(e5 at I lanu)ry2022 650,736 362,098 162,443 1,175,277 Fund balances at 31 December 2022 605.825 314.449 153.658 1.073.932

BOU Annu31 Report & Account5 | 2023139 BOU BRITISH ORNITHOLOGISTS. UNION BALANCE SHEET AS AT31 DECEMBER 2023 2023 2022 Flxed assets Notes Investments 14 407,682 519,707 Current a55et5 Debior5 Cash ai bank8nd in hand 16 55,724 648,913 47,702 545,662 704,637 593,364 Crediiors.. amounts falllng due wlthln one year 17 141,5271 Net current asset5 663,110 554,225 Total assets less current Ilabllltles 1.070,792 1,073,932 Capital funds General endowtnent funds 21 157,239 153,658 Income funds Restricted funds 20 271,191 314,449 Unrestritted funds 642.362 605.825 1.070.792 1.073.932 The accounts wÈrÈ approvÈd bythÈ MÈmbÈrs of Councll on 6 March 2024. DrGr&]lle Buchanan Presidcnl

BOU Annu31 Report & Account5 | 2023140 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng policies harlty Informallon The British Ornithologi5t5' Union is a registered charity in England and Wales12498771 and Scotland ISC0448501 and 15 unincorporated. The charity is a public benefit company. The charity's place of buginess Is.. PO Box 79, Pembroke, 5A72 9A1 Uniied Kingdom. Accounting convention The account5 have been prepared in accordance with the chariV5 trust deed. the Charities Act 2011. the Ch3rities Trustee Inve5trnent IScotl8ndlArt 2005, the CharitiesAccounts (Scotlandl Regulations 2l￿6 las am&ndedl and"Accounting and Rèporting by Charities.. Statèment of Recommended Practice applicable to charities preparingtheir accounts in accordance with the Financial Reporting Standard applicable in the UKand Republic of Ireland IFRS 1021. las amended foraccounting period5 comrnencing from I january 20161. The chariiy is a Public Benefit Entity as defined by FRS 102. The charity has taken advaniage of the provision5 In the SORP forcharitie5 applying FRS 102 Updaie Bulletin 1 not to prepare a Staternent of Cash Flows. The finantial statements have departed from the Charities (Aciounts and Reportsl Regulation$ 2008 onlyto the extent required to provide a true and fairview.This d&￿rtUre has Involved following the Staiemènt of Recommènded Pr8Ctice for charitiès applying 102 rathert￿n the ver5ioD of thestatement of Recomtnended Practice which 15 referred to in the Regulation5 but which has since been withdrawn. The finaniial statemenisare prepared in sterling, which isthe functional currentyof the charity. Monetary amounts in these financial statements are rounded to the nearest £. Thè financial siatements have be@n prepared under the historical cost convention, modified to Includethe rev31uation of cert31n financial in5rruments ai fair value. The principal accounting policies adopted are set out below. fjolng ¢on¢ern At thè iimÈ of approving the financial ststÈmÈnis, the membe￿ of Council hav? a reasonablÈ expectaiion that the charity has adequate resourie5 to continue in operational existence forthe foreseeable future. Thusihe Member5 of Council continue to adopt the going concern t￿515 of accounting in DreDarin£ the financial ￿atemen[s. 1.3 Charltable fvnd$ Unrestritted funds a￿ available for use at the discretion of the Members of Council in furtherance of their charitable objectives unlessthe funds have bÉÈn designated for other purposes. DeSIg￿ted funds are unrestriaed funds earmarked by Ihe trustees for ￿nicular future project orcommitment. Re5tritted fund5 are sublecied to re5triciions on their expenditure declared bythe donor orthrough the tertns of an 3ppeal, and fall Into one of two sub-classÈs'. rÈsiritted Income funds or Èndowment funds. Endowmeni funds are subject to specific condiiions by donors Ihai th@ capital must be maintained by Ihe charity.

BOU Annu31 Report & Account5 | 2023141 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS FOR THE YEAR ENDED 31 DECEMBER 2023 Accountln8 policles Icontinuedl Income I Incoming resources are included In the siatemeni of fin8ncial activities wh&n entitlement has passed to thè ch8riry,' it is probable thatthe economic benefits associated with Ihe transaction will flow to the charity8nd the amount can be re113bly measured. The Income from doDatiOll5 or grants is recognised when there 15 evidence of entitletnent lo the gift. receipt 15 probable 3nd its amount ian be measured reliably. Legary income is recognised when recelpt Is probable and entitlement is est3blished. Income from donated goods is measured 8t the fbirv81ue of thegoods unless this is Impractical ro me8sure reli8bly, in which case the value 15 derived from rhe cosito the donor or the estimated resale value. Donaied facilitie5 and services are recognised in the account5 when received if thevalue can be reliably measured. No amounts are included for the contribution of general volunteer5. Intomè from contrarts for the supply of servitès is retognisÈd with thè delivery of ihe contrarted service. This is t13ssified 8$ unrÉstricid funds unless thre is a contrattual requirèmènt for it to be spènt on 8 p3rtitular purpose and returned If unspent, In which case It may be rÈ8arded as restritted. Expenditure Expenditure is recognised on an accruals basis as a liability Is incurred. Expenditure includes any VATwhich cannot be fully recovered. and is classified under headings of the statement of financial acrDiities to which li relate5'. Expenditure on raising funds include5 the cosrs of all fundraising activitie5, evenrs non-charitable trading activitie& and the sale of donated goods. Expènditure on t￿ritable attivitiès intludÈs all tosts incurred bya tharity in undÈrtaking artivitiÈs thÈt further its charitablè aimsforthe benefit of its benefici3riÉs. intludingthose support costs and tosts r*lating io thé governante of thè charity aPPOrtionÉd to th3ritable artiirities. allocated directly to ihat activity. Shared costs are apportioned between the 8CllVlties they contribute to on a reasonable,

BOU Annu31 Report & Account5 | 2023142 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng pollcles Icoitinuedl Overhead5 Overhe8d costs 8re 811ocated io Ihe relev8nt cost centres In the following proportions.. A F Langlord remuneratlon Lwalker remuneratlon S P Dudley remuneratlo Offlte tosts CoDference costs bhanagemeni administration 1546 4546 7.5% 47.5% 22.596 6096 22.5% 60% 37.586 45% 15 R￿earCh cosis 2.586 2.5% 2.5 10086 100% 100% 100% These proportions were decided upon bythe trustees, who believethat thèy represent a fair reflettion of the resources expended Flxed asset Investments Unlisied equity Investm&nts are initially recorded at COSL and subsequently measured at f8ir Value. If fair value cannot be relièbly measured. a55etsare measured at Cost le55 iTnpairmenL Llsted Inveaments are measured at falrvalue with changes In fair value being recognised in Income or exr*nditJre. Cash and cash equivalents C35h and cash equivalent5 include cash in hand, deposits held ai call with banks. oiher short-term liquid inve5ttnent5With original maturities of three monih5 Qr le55. and bank overdrafts. ￿nk overdraftsare Shown within borrowing5 in curreni liabilities. Financial instruments The (￿rIty has eletted 10 apply the provisions of Section I l Basic Financi81 Instruments, and Section 12'01her Fin8nci31 Instruments155ues' of FRS 102 ro all of its financial instruments. Financial Instruments are recognised in Ihe charitys balance sheÈt when the charity becomes partyto the contrartual provisions of the Instrument. Financial a55et5 and liabiliiie5 are off5ei. with the nei amounrs pre5enied in thefinancial 51atements. when ihere 15 a legal enforceable right to Sèt off the recognised amounts and there is an intention to settle on a net basis or to realisethe asset and Settle thÈ liability simultaneousty. 8trsi¢fin#n¢itsl#ssets Basic financial asset& which include debtor5 and cash balance5. are initially rne3sured attran5aCtion price including transaction costs and are subsequendy carried at amoriised cost using Ihe effertive Interest method unless the arrangement consiitutes a fin8ncing Ir8nsaction, where the tr8nsaction is measur&d 8t the present value of the future receipts discounted at a market raie of interesr. Financial assets classified as receivable within oneyear3re not amortised.

BOU Annu31 Report & Account5 | 2023143 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng pollcles Iconcinuedl P(r$i¢lirt•nti(rlli(rbiliti¢s constitutes a financing transaition, where the debi Instrumeni 15 measured aithe present value of the future payments d15counted at DÈbt instruments are subsequently carried at amoriised tost, using thè effettwÈ interest r3tÈ method. Trbde crediiors are obligations 10 pay for goods or services that have b@en acquired in Ihe ordinary course of operations fro m on-current IiBbilitie5. Trade creditor5 are recognised initially at tr3ll5action price and 5ub5equently me35ured at amort15ed c05t sing the effective interest method. Derecognition oAfinunri¢TI li¢Tbilities Finanoal liabilities are derecognised when the charitys contrauual obligaiions expire or are discharged or cancelled. Employee benefflts The cost of any unused holiday entitlement is recognised in the period in which the employeè's sèNices are received. Terminaiion benefits are recognised immediately as an expensewhen the charity is demonstrably commitied to ierminate the employment of employee orio provide ierrDin3tion benefit5. Critical accounting e5timate5 and judgements In the application of the charitys accounting policies, the Metnbersof Council are required to makejudgements. e5titnates and 355UtnptiQn5 aboutthe carrying arnount of assets liabilities th4t are not re4dily appareDI from oiher sourc￿. The e5tirDates and 3ssociaied assumpuons are basèd on hisiorical expèrienc? and oiher f3ciors thai are considèrèd to be relewani. Artual resulis may differ from these estimate5. The estimate5 and underlwfjg a55umptlOn5 are rvrfiewed on an ongoing ba515. Revisionsto accounting e5tirnates are recogni5ed in the period In which the estimate 15 revised whererhe ￿vIsion affetts only that period, or in the period of the revislon and future periods where the revision affec￿ boih current and future periods. Donatlon5 and legacies Unrestricied funds Restritted funds 2023 2022 Donations and gifts 1,395 36,657 1,395 36.657 10,738 37.229

BOU Annu31 Report & Account5 | 2023144 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 2023 2022 118,906 108,752 71 20,417 Other publication income Conference income 30.356 149.262 129,240 Investments Unrestricted fund5 Restritted fund5 Endowment fvnd5 general Total 2023 2022 Income from listed Investments Inrerest receivable 17,749 10,743 4,453 1,656 23,858 10.743 22,894 2,222 28.492 4,453 1,656 34,601 For the year ended 31 December 2022 19.321 4.323 1.472 Raising fund5 2023 2022 Managemeni costs- purchases Managemeni cosrs- wages and salaries Managemeni costs- employer's NIC M3n88emeni costs- pènsion costs 4,637 42,911 5,774 47.070 1,244 3,650 4.321 Fundraising and publicity 51,869 57,738 2023 2022 Rès*3rth- 3dministr8tion costs 1,574 60,097 32,166 59,281 46.723 Conference c05tS 93,837 107,865 Grant and bursary funding of activities (see note 81 Share of governance costs (see note 91 58,686 16.685 71,356 16,808 169.208 196.029

BOU Annu31 Report & Account5 | 2023145 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Grants and bursarles payable 2023 2022 Awards nine In 2022 C181re Bransion IPost-doctoral Research Assistani, University of Glasgow, U Andrea Estandia IPhD student, Edward Grey Instituie of Field Ornithology, UKI Katarzynalanas I￿515tant PrOf￿50r(adJun(tl. Polish Academy of Sciences, Po13ndl Rosannelose Michielsen IPhD siudent. Polish Academy of Science5. Poland) Gabriel Lopez SegowanolP05tdoc. Univer5idad Nacional Autonotna de Mexico. Mexico) Enriqueta Velarde (Senior Researcher. Universidad Veracruzana. Mexico) Akshay Bharadwaj IMa5ters student. Indian InstitLrte of Science. India) Federico De Pastalis (Postdottoral Associate. ISPR4 Italy) Mithall*2ierski IPhD studen¢ Unlversity of Oxford, UK) Veronica Méndez Aragtin IAcademic Director, Universiiy Centre of the Wesrfiords, Iceland) Kristen Wacker IPhD candidate, University of Michi8Èn, USI Klara K. Nordén IPhD siudenc Princeton University, US) Tere￿ Pegan IPhD student, University of Michigan, US) Anap15phaku Afan (Research Associate, A P Leveniis, Nigenal Roman Alberto Ruggera IProfesorAdjunto. Instituto de EcorregionesAndinas, Argentina) Chimalosiah Nwaoga Uunior Research Fellow. University of Groningen. Netherlands) Olufemi Olubodun IPhD student. FitzPatrick Institute of African Ornithology. South Africa) 1.498 1.950 1,500 iooo 1.915 1.974 1500 1,675 1,500 1,500 2,000 1,885 1,683 2,449 1.500 1500 1.955 Conference attendance award5 4,700 University of Tasmania Uohn & Pai W3rham Studentship- Paige GreÈnl McGIll Universiiy Uohn & Pai Warh3m Studentship- Emile Brisson-curadeaul Mon3sh Universiiy Uohn & Patwarham Studentship- Dr Rohan Clarke) University ol East Anglia, UK Uohn & Pat Warham Studeniship- knrsiy Franklinl Lancaster Univ&r51tylBrenda and Tony GibbsAward Stuart sharpl 9,289 25,095 8,669 30,747 14421 20,000 58.686 71.356 Support and governan¢e cos¢$ Support coas Governance cosrs 2023 2022 Audit fees Legal and prof￿510￿al Account8niy Costs of trusiees. and committee meetings Support orficÈrs honoraria 5.580 1.024 3,418 5,580 5,220 2.585 3,036 1,217 4,750 3,418 3,112 3,551 3,551 16.685 16.685 16.808 Analysed between 16,685 16,685 16,808 Governance costs includes paymentstothe auditors of £5.58012022- £5,220) for audit fees 4nd £3.41812022 £3,036lfor other sèNices.

BOU Annu31 Report & Account5 | 2023146 BOU BRITISH ORNITHOLOG15TS' UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 10 Members of Councll None of the Metnbersof Council lorary persons connected wilh therlll received any remuneration or benefiis from the charityduring theyear. During the year two of the Members of Council were reirnbursed expenses totalling£41712022- no members were reimbursed expenses). These expenses represenrtravelling c05rs incurred by the Members of Council in ihe performance of their dutie5. EmployeÈs Number of employees The average monthly number employees during the year was.. 2023 2022 Employment ¢osts 2023 2022 Wages and ￿larIeS social security Costs Other pension costs 78.231 84,488 2,222 6,809 86.214 93.519 No employee received employee benefits of more than £60,000 during theyearl2022- nill. 12 Net gainslllossesl on investments 2023 2022 Unrestricted Endowment fund5 funds Total Unrestricted Endowment funds fund5general Toial Revaluaiion of investmen 1,925 13,696 139,6441 110,2571 investments 117.6741 117,6741 15.9031 1.925 13.9781 139.6441 13 Taxation The charity is exetnp¢from tè% on income and gainsfalling wiihin section 505 of theTakes Att 1988 or seciion 252 of thpTaxa¢ion of Chargeable Gains Act 1992 to the extent that these are applied to Its charirable objec￿. 14 Flxed asset investments Cost or valuatlon At 113nu3ry 2023 Addition5 Valu3tion change5 Llsted Investment5 519,707 4.278 13.697 1130.0001 At 31 December 2023 407,682 Carrying amount At 31 December 2023 407.682 At 31 December 2022 519,707

BOU Annu31 Report & Account5 | 2023147 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 15 Financial instruments Carrying amount of financial assets Trade debiors 2023 2022 47.353 45,676 766 Other debtors Bank and tash 648.913 545,662 Measured at cost 697.384 592.104 sted Invèstmènts 407.682 519,707 Measured at tn3rketvalue 407.682 519,707 Carrylng amount of flnanclal Ilabllltles Othert3X3tion and sot131 securlty Actruals 604 17.982 Measured at lost 18.665 14,745 16 Debtors 2023 2022 Amounts fallingdue within one year.. Trade debtors orher dÈbiors Prepayments and accrDed incomè 47,353 1,118 7,253 45.676 766 1,260 55,724 47.702 17 Credltor5 Notes 2023 2022 Amounts falllngdue wlthln one year.. Othertaxation and social Security Deferred incotne 18 24.394 17,982 41,527 39,139

BOU Annu31 Report & Account5 | 2023148 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 18 Deferred Income 2023 2022 Other deferred Income 22,862 24,394 Deferred income relate5to subs(riptions re(eived in advance of £2D.64912022- £19,698) and income received in advancefor conferences in future years of £2.21312022_ £4.6961. 19 Pen$lon$ and Other post-retlremeni benefits Defined contrlbutlon penslon plans ConlributiOn5to defined contribution plans are recognised a5 an expense in the period in which the related service is provided. The charge to profit or loss in respect of defined contribution plans was £7.98312022 £6.8091. Restrirted fund5 The income fund5 of Ihe charity include restricted fund5 compri5ill8the followng unexpended ￿lanCeS of donations and grant5 held on trustfor specific purposes.. Movement in fund5120221 Incotne E¥penditure Balance at 1 lan 2022 Transfers Balanie at 31 Dec 2022 Research Fund john & Paiwarham scholarship Fund Brenda & Tony Gibbs 8equest Small grants 79.633 172,421 110,044 4.323 83.956 134,599 85,894 10,000 134,3841 13,4381 10,000 362,098 14.323 156,3391 15,6331 314,449 Movement In lund$120231 Income Expenditure Balance at Transfers Balance at 1 lan 2023 31 Dec 2023 ReSea￿h Fund john & Pat Warham Scholarship Fund Brenda & Tony Gibbs Bequest Small grants 83,956 134.599 85.894 10,000 4.453 88,409 91.728 84,052 7.002 138.9741 13.89 12,9981 314,449 4,453 143,64A I4,(￿￿) 271,191

BOU Annu31 Report & Account5 | 2023149 BOU Restricied funds Include the Research Fund. This includes the IncomÈ arising from invÈsimÈnts held in the Endowmen¢ Fund. Thelohn & Pat Warham schol8￿hlp Fund is to be used for research on Sphenisciform and Procellaniform seabirds and th@ income arising from Investments. The Brenda and Tony Gibbs Bequest is to be used for research on tracking and migration studies Including the use of newtechnologies. The transfer to the unrestricted fund represents an administration fee of10% of the grantS8warded from ihelohn and Pat Warham Scholarship Fund and the Brenda and Tony Gibbs BequesL The small grants fund represents a donation that was received in 2022 thai Is to be used io award small grants in futureyears.

BOU Annu31 Report & Account5 | 2023150 BOU BRITISH ORNITHOLOG15TS' UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 21 Endowmentfunds Endowment funds represent assets which must be held permanendy by the charity. Income arising on the endowment funds can be used in accordanc? wilh the obiecis of the ch8riryand is Included as resLricted Incom?. lthy capit81 gains or losses arising on Ihe assets form Part of the fund. Movement in funds120221 Expenditure Transfers Balance at 1 lan 2022 Income Revaluationsg3ins and losses Balance at 31 Dec 2022 L&MTFund Re5e3rch Fund 128.596 11.236 22,611 1.472 18.3721 121.696 10.610 21,352 Hutt Legacy 162,443 1,426 153,658 Movement in funds120231 Expendlture Transfers Revaluatlotts galns and losses Balante at Income Balan£e at 1 Jan 2023 31 Dec 2023 L&MTFund Re5eèrch Fund Hutt Lega(y 121.696 10.610 21.352 1.656 2.676 12491 126.028 10.361 20.850 153,658 1,656 157.239 The Landsborough and MaryThomson Research Fund IL & MT Fund) and the Hutt Lega(y repr&sentfunds set up by individual donors. The purpose of the L8MT Fund w3Stofund reseBrch. Income arising frorn the capital held in inve5ttnent5Within Endowment Fund5 15 credited to the restricted Research Fund. The Resèarch Fund represents permanent capit81, the Income from which Is Iransferred to the fund of the same name in Resiricted Funds to be spent solÈly on research activities lÈ.g. grants and bursariesl. The Hutl Legacy Is intended forthegeneral purpose5 ofthe Union and interest arising from this item 15 credited to General Unrestricred Fund5 which itself repre5ent5 investments and net assets which are held for the daily running and maintenance ofthe charity. Analy515 of neta55ets between funds 2023 Unrestrl£ted fund5 Restrlcted funds Endowment funds Total 2023 Fund balance5 ai 31 December 2023 are represented by.. Investments 250.443 391,919 157.239 407.682 663.110 642,362 157.239 I.D70.792

BOU Annu31 Report & Account5 | 2023151 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Analysls of netassets berneen funds Icontinuedl 2022 Unrestri(ted fund5 Re5tricred fund5 Endowtnent funds 2022 Fund balances at 31 December 2022 are represented by.. Investments 248,052 357,773 117,997 196,452 153,658 519,707 554,225 605.825 314.449 153.658 1.073.932 Flnanclal ¢ommltmeNs. guarantees and contlngent Ilabllltles During the year the charity awarded a grant tsf £20,000 from the Brenda & Tony Gibbs Beques¢ of which no payments had been made by theyear @nd. The proieci Is due to run from lanu3ry 2024 toluly 2025. During 2D22 the charity awarded the final john and Pai Warham Studentship grant of £8S,000 of whiih £54.253 is still to be wid to the recipient. This Student5hip 15 due to run from 2023 to 2027. Related party transactions There were no disclosable related party Iransaction5 during the year12022- none). Remuneratlon of key management personnel remuneration ofkey man8gement personnel Including employer pension contributions IS as follows.. 2023 2022 Aggreg8te CoMpen￿tion 48,570 56,154 Transactlons wlth related partles During the year paytnent5 of £4,79612022 £1,842lwere made to Profes50rl Gill. wife of G Appleton. a Trustee. Thi5 wa5for IBIS editorial 5ervice5 and the Ir4nsactiOn5 were on an arm5 length b35i5.

BOU Annu31 Report & Account5 | 2023133 BOU Independent auditor's report to the members of the British Ornithologists, Union for the year ended 31 December 2023 Opinion Ive have audiitd Ihc financial 5tal¢menls of Briiish Onuthologisls, Union Iihc chaiilv'l for the yeai- enoed 31 Deceniber 2021 ivhivh coinpiise the slaienient ol linancial activities, tht balancc ilittt and Ihe notCS to Ilic tillancial siatciienlR, including a summary ol- signilicanl accouniing policiei. Tht financial reporting frameviork that has IKen applied in their prepar?£ lion is applicable law and United Kingdom A￿Coun[ln£ Sland￿, includ￿£ Financial Rcponuig Standard 102 Thc Financial Rcportin£ Standard applicable in Ihc UK Rcpublic ol Iruland Iuniicd Kingdom Gcncrally Acccplcd Accouniing Pi'aclicel. In our opinion, the fin1( ncial slaiementts.. give a true dnd fdir vie￿. of the bldte of the charity s affairs d5 di 31 December 2023 of its incoming resources dnd application of resouries, tor the }'ear then ended; have been properl}, prep￿rd in ac£ordance ￿1th Uniied Kingdom Generally Accepied Accouniin£ Elactice,. and h<ive betn prep<￿ed in accordance ivith (he requiiEmenis ol Ihe Charilies Aci 2011, (he C1iarities and Trusiee Invesimeni (Scoilandl Act 2W5 and regul&lion 8 of Ihe Chariiies Accounts (Scoilandl Regulaiions 2￿ las mended). Basis for opinion We condueied our auJil in a¢Lordan¢e iiiih Iniernaiional Siandards on Alldiling IIIKI IISAS IIIKII and appliiable la￿,. Ollf Te.spoll¥ibililies under Iho¥e blandaid.S dl-e furth¢r de%¢ribed in ihc Audiiof'4 iesptsnsibililies foi- Ihe auJil ol Ihe findncial .slaiemenlb seciion ol our report. Il'e are indepelldenl of the charity In accordance ividi the ethical i-equiremenls Ihai are relevallt 10 oui- audil of the finanyial %iaiemenli In Ihe LIK, Including the FRC'b Eihieal Sianddtd, and we have lullilled our oiher eihical re%pon%ibililiei In a¢co."dan¢t Liiih thes¢ i-equiremcllls. 11 ¢ klievt Ihai Ilic audil ¢vid¢llC¢ Il'e hdvc obidllled Is %ullivienl and appropridie 10 PlDvidc d basis foi our opinioll. Conclusions relating to going concern In auditing the linallLial 51at¢nenls, wc hav¢ concluded that thc Trnsttts, use ol'thc going conccin basis ol accounting In the prepaiation of Ihc linancial 5tdlemenls IS dppropnaie. Based on Ihc work we havc perfortlled. The havt not Idcnlificd any material unceilainiits relating lo cvenls or collthtions thai. individually or collectively. may cast significant doubt on the charity s ability to continue as a going concern for a period of at least twelve months fron] when The financial statements are auihorised for issue. Our rcswnsibiliiics (?nd Ihc rcsDonsibililies of Ihc Nqcmbcrs of Council iiiih rcspiol 10 goin2 conccrn are descriEed in The relei'anl se£lions of Ihits rewrt. Other information The oihei. inforni<ilion comprises Ihe infomaiion iniluded in the annllal rewrl oiher than the tinancial slaiemenis 1< nd our audiior's report theiyon. T4e Members of Council are resrH)nsible for Ihe other infomiaiion ￿ontained within Ihe annual rewrt. Our opinion on the fiiiancial siaiemenis does noi cover the oiher inf0rn11< lion and we do iioi expiyss <ln} iorm of <lSSUYLrtce conclusion Ihereon. Our restN)n<ibilily is 10 IEad Ihe oiher inlormalion and, in doing so, con%ider whether (he oiher information if m1{ ieiil111y incon%istenl wilh the finaniial sL11emenis or our

BOU Annu31 Report & Account5 | 2023134 BOU knowlcdge obtained In thc course of Ihc audit, 01- othe￿15¢ appears to k maicrially misslaicd. If ￿'t Idcntily such ￿atella1 Inconsisiencics or apparcnl maienal misslalcmenls, Mre arc rcquircd lo determine whether this giles rise 10 a maienal mis5talcmenl In thc financial slatcmenls themsclvcs. If. bascd on the Viork wc have rcrformed, we conclude that there is a malcrial misslatcmcnl of this othcr Infonnalion, wre are rcouircd lo rcwrt Ihat faci. Il'e have nothin£ to report in this fu£ard. Matters on which we are required to report by exception Il'e hai'e nothin£ lo repori in re5reci of the followrin2 mailers in IElalion lo which the Charities (Accounts and Reporlsl Re£uialions 2008 and the C1￿￿1[1eS Accounis IScoil<Thdl Regul<llions 20061Ilb amended) i'equire us 10 report 10 you if, in our opinion.. Ihe inforni<llion b?Iven in the financial Sl<iiemenis is inconsisieni 11 an) maieri<111'especi widi the Ti'usiees, report-, or %llfficieni and proper accouniinL) record£ h1< ve rt(Il been kepi-. or the financial 8laiemeni% are not in aoreemeni iviih the accounting record%'. or we have noi received all Ihe i111ormaiioii and explartaiioni we reouire for our audil. Responsibilities of Members of Council As ¢Aplained mole lully in th¢ sldlement of Tiustees, responsibilities, Ilie N.'lenibers of Council are responsible for the prepaiation of the financial %utrnenls and for being saiisficd Ihdl Ihey giv¢ a Iiue alld fail vieiv, dnd foi such iniemal conliol as It]e Membe15 of Coull¢il deiermiiic 15 n¢ctSsary 10 eiiablc the pi¢paFalion ol. finaiicial slalcmenls Ihal air ftc¢ I'iom matei-ial mis%lalemcni, wheihei- due to fraud or eTTor. In prcpiiiing thc financial 51alcmtlll%, Ihc Ilembers oi Council are i-¢spon%ible for asSe55ing the ch¢iriiy s ability lo coniinue 1¢ going concei-n, disclosing. as applicable, nallct% i-elaied to Eoing concein and using the going conccin basis ol- ociounling unlcsb the Mcmbe15 of Council ciihcr inlcnd lo ccase opcralions, 01 have no i-t￿1]S11c alicrnalive bul lo do so. Auditor'5 responsibilities for the audit of the financial statements Il'e have been appointed as auditor under section 144 of the Charities Aci 2011 and section 44illlcl of the Charities and TTusiee Investmeni Iscodandl Act 2005 and Trport in accordance with the Acts and relevani re£ul&lions made or having effecl Ihereunder. Our obiecliiles are to obtain reasonable assuiance aboui wheiher the financi<il siatemenls as a ￿hole <1re free from maleii<il misslatemenl, ..heiher due lo fraud or error, and lo issue an <1uditor's report thai includes our opinion. Reasonable <1ssurance is a high leh'el of <issurance bul is noi a guaraniee Ihai an audil conduiied in aciordance iiith ISAS IIIKI ￿,111 al￿ays deteci a material missialemeni ￿hen il eAisl%. Mistslaiemenis Lan illitse fmm friiud or error dnd are con%idered mdieridl il. individudll}' or in die aggregaie, Ihe5' iould reasonably Et expected lo influence the econoinic decisions of users taken on the b<1SiS of Ihese fiiianiial siaternenis. A fuither description of our responsibilities is available Ihe Financial Repoilinby Council's websiie ai-. hiip%..Ilwww.frc.org.llklaudiiDr%i-egpon%ibilili¢%. Thi% de%cripiiDn fnrm% part nl our audiiorfi ieport.

BOU Annu31 Report & Account5 | 2023135 BOU Exlent to which the audit was considered capable of deteciing i rregularities, includ ing fraud I￿CEllIantIC5, including fraud, ale Instances of non-conipliance with laws and rcgulalions. Ivt design procedures In line with our reswnsibiliiies, outlined abovc and on the Financial Rewrting Council's website, lo delect material misslalcments in respect of irregularities, including fraud. Il'c obtain and updalc our undcrstanding of enliiy, Its activitics, its control cnvironmcni. and likely futuru dcvclopmcnis. illcludino in relation to Ihc Icgdl dnd rcguldlory frdmcwork dpplicablc dnd how thc cnlity is complyin2 ￿'1th Ihdl framcwork. Bdscd on this understandin£, we identify and assess the risks of material missthtemenl of the financial statements. whether due lo fraud or error, desi2n and peiform audit procedures re<ponsive 10 Ihose risks, and obtain audit evidence Ihal is sufficieni and appropriaie 10 provide a basis for our opinion. This includes considcralion of thc risk of acts by thc cntil) Ih(Il Th(cre conirary 10 applicablc la￿'S and ri£ulalions, including fraud. In response 10 (he risk of irregularities <ind non-compliance iiiih laivs ￿ld reEu11< lions. including Ii'aud, we designed procedures ￿hleh included.. Enqlliry of ma11a(Terner.i and Iho%e charged Thrjih governance around actual and poieniial liligaiion and claimi a% ￿..ell a% acmal, SU4￿Cled and all¢Lyed iraJd., Reviewinby rninuies of meeiings of Ihose charged wilh LyoveimJllce,' A8%e%%ing Ihe exieni i)f compliance with ihe lawg and regulaiinnl coniidered io have a direci maErial eiieci on ihe financial siaiemenL% or Ihe operdii01i1 of Ihe enlily Ihrough eiiquiry and in.%peciioii-, Rciiewin¥ liiiallcial siaiemenl disclosures and lesling to suppoilillg d(Kumeniaiioii io assess ¢ompliance wilh applic4ble la￿$ dnd rcLTulaliull%: P¢iformingT audit ￿0[k over the 115k ol. managtmcnt bia% and OvC￿]de ol contiols, including testing ol Jouinal ent11¢5 and oth ci adiuslment5 for appi-opriatentss, evalualinE the busin¢55 iatiollalt ol bignilicanl tian5aclions outside Ihc noimal vOUl3¢ ol-bu5ill¢sb and rcviewing accounting c5timates lor Indicator5 of potential bia5. Because of the Inhcrenl limilaiions of an audit, there is a risk that wc viill not detect all irrcgulthriiics, Includin£ those Itadir.g lo a mateiial misfilalcmcni In the linancial ilalcmenls or non-conipliance Thrith rcgulalion. This risk incirases Ihc more th?£ t compliance with a la￿, or re£ulalion is removed Irom the evtnls and Iransaciions rellected in the financial stalcmenis1 s we ￿11] k Icss likcly 10 bccomc ai4arc of instances of non-compliancc. Thc risk of not dclcciing a material mi5Stalemcnl Irsuliin2 from fraud is hi2hcr than lor onc rusulting from error, as fraud may involve collusion. forgiry, inluntional omissions, misrcprcscntations, or the ovcrridi of intcm&l control. Other matter5 Your allenlion is draThrn to the fact Ihai the charity has prepared financi￿ slaiements in aciordance with"Accounling and Repoiling by Chariiies.. Sialemeni of Recommended Practice <ippliiable 10 charities prep<irin£ theii. accounis in accordance willi the Financial Repoi1ing Si<ind<1rd appliiable in Ihe UK and Republic of Ireland (FRS IQ21 l<iS amended) in piEferenee 10 the.4ccouniing and Repoi1ing by Ch3rilies.' Statement of Recommended Pr<lCtice issued on l April 2(X)5 which is referred to in the ex(￿][ regulaiions bui h llo￿, been withdrawn. 'Ili% h￿£ been done in order for Ihe financial %ldiemeni% 10 provide and fair view in dccorddnie ￿1th Cu￿nI (ienerally AcLepied Accouniinby Pr&cii¢e. Use of this report Tlii¥ report 14 made ¥ol¢ly 10 the ¢harily s Iw¥lte%. &% a bod5', in ac¢oidan¢e wilh part 4 of the Chanlie% IAcvounl4 dnd ReporL%I Rt¥ulaiions 2008 dnd rc¥ulaliun 10 ol lh¢ Chdiili¢% Accuunls1.SLoilJndl Reguldlion5 2(1)6. Our audil wo]* has been undtrtakcn 50 Ihdl ive mi¥hi slaie lu

BOU Annual Report & Accounts | 2023 | 36

the charity's trustees those matters we are required to state to them in an auditors' report and for no other purpose. To the fullest extent permitted by law, we do not accept or assume responsibility to anyone other than the charity and the charity ’ s trustees as a body, for our audit work, for this report, or for the opinions we have formed.

Tracey Richardson BSc (Hons) FCA (Senior Statutory Auditor) 11 March 2023 Chartered Accountants

Statutory Auditor

Westpoint Lynch Wood Peterborough Cambridgeshire United Kingdom PE2 6FZ

Azets Audit Services is eligible for appointment as auditor of the charity by virtue of its eligibility for appointment as auditor of a company under section 1212 of the Companies Act 2006.

BOU Annu31 Report & Account5 | 2023137 BOU BRITISH ORNITHOLOGISTS, UNION STATEMENT OF FINANCIAL ACTIVITIES FOR THE YEAR ENDED 31 DECEMBER 2023 Currentflnanclal year Unr@stnct?d funds Restritted funds Endowmènt funds Total Total 2023 2022 Notes Income from.. Donations and legacies 38,052 38,052 47,967 149,262 28.492 149,262 34.601 129,240 25,116 Investments 4,453 1,656 Total income and endowments 215.806 4.453 1.656 221.915 202.323 Expendit Raising funds 51,869 51,869 57,738 125,561 43,647 169,208 196.029 Total expenditure 177.430 43.647 221.077 253.767 Net gainO11055e51 on investments 12 15,9D31 1,9251 13,9ni Net Incomlnglloutgolngl resources before transfers 32,473 139,1941 3,581 13,1401 Gross transfer5 between fund5 4.064 14,0641 Net movement in funds 36,537 143,2581 3,581 13,1401 Fund kl3nces at I lanuary2023 605,825 314,449 153.658 1,073,932 1.175,277 Fund balance5 at 31 December 2023 642,362 157,239 1,070,792 1,073.932 The statement offinancial allivities include5 all gain5 and los￿ recognised in theyear. I Income and exp@nditure Is derKved from continuing activities.

BOU Annu31 Report & Account5 | 2023138 BOU BRITISH ORNITHOLOGISTS, UNION STATEMENT OF FINANCIAL ACTIVITIES ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Prlor flnanclal year120221 Unrestncted funds Restrirted funds Endowmènt funds Total 2022 Notes Income from.. Donations and legacies 37,967 10,000 47,967 129,240 19.321 129,240 25.116 Inve5ttnent5 4.323 1.472 Total income and endowment5 186.528 14.323 1.472 202.323 Expendit Raising funds 57,738 57,738 139,690 56,339 196,029 Total expenditure 197.428 56.339 253.767 Net gainOllos5e51 on investments 12 139,6441 149.9011 Net In¢rJmlnglloutgolngl resour¢es before transfers 150,5441 18.78SI Gross Iransfers between funds 5,633 15,6331 Net movement In funds 147,6491 18,7851 Fund ￿15n(e5 at I lanu)ry2022 650,736 362,098 162,443 1,175,277 Fund balances at 31 December 2022 605.825 314.449 153.658 1.073.932

BOU Annu31 Report & Account5 | 2023139 BOU BRITISH ORNITHOLOGISTS. UNION BALANCE SHEET AS AT31 DECEMBER 2023 2023 2022 Flxed assets Notes Investments 14 407,682 519,707 Current a55et5 Debior5 Cash ai bank8nd in hand 16 55,724 648,913 47,702 545,662 704,637 593,364 Crediiors.. amounts falllng due wlthln one year 17 141,5271 Net current asset5 663,110 554,225 Total assets less current Ilabllltles 1.070,792 1,073,932 Capital funds General endowtnent funds 21 157,239 153,658 Income funds Restricted funds 20 271,191 314,449 Unrestritted funds 642.362 605.825 1.070.792 1.073.932 The accounts wÈrÈ approvÈd bythÈ MÈmbÈrs of Councll on 6 March 2024. DrGr&]lle Buchanan Presidcnl

BOU Annu31 Report & Account5 | 2023140 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng policies harlty Informallon The British Ornithologi5t5' Union is a registered charity in England and Wales12498771 and Scotland ISC0448501 and 15 unincorporated. The charity is a public benefit company. The charity's place of buginess Is.. PO Box 79, Pembroke, 5A72 9A1 Uniied Kingdom. Accounting convention The account5 have been prepared in accordance with the chariV5 trust deed. the Charities Act 2011. the Ch3rities Trustee Inve5trnent IScotl8ndlArt 2005, the CharitiesAccounts (Scotlandl Regulations 2l￿6 las am&ndedl and"Accounting and Rèporting by Charities.. Statèment of Recommended Practice applicable to charities preparingtheir accounts in accordance with the Financial Reporting Standard applicable in the UKand Republic of Ireland IFRS 1021. las amended foraccounting period5 comrnencing from I january 20161. The chariiy is a Public Benefit Entity as defined by FRS 102. The charity has taken advaniage of the provision5 In the SORP forcharitie5 applying FRS 102 Updaie Bulletin 1 not to prepare a Staternent of Cash Flows. The finantial statements have departed from the Charities (Aciounts and Reportsl Regulation$ 2008 onlyto the extent required to provide a true and fairview.This d&￿rtUre has Involved following the Staiemènt of Recommènded Pr8Ctice for charitiès applying 102 rathert￿n the ver5ioD of thestatement of Recomtnended Practice which 15 referred to in the Regulation5 but which has since been withdrawn. The finaniial statemenisare prepared in sterling, which isthe functional currentyof the charity. Monetary amounts in these financial statements are rounded to the nearest £. Thè financial siatements have be@n prepared under the historical cost convention, modified to Includethe rev31uation of cert31n financial in5rruments ai fair value. The principal accounting policies adopted are set out below. fjolng ¢on¢ern At thè iimÈ of approving the financial ststÈmÈnis, the membe￿ of Council hav? a reasonablÈ expectaiion that the charity has adequate resourie5 to continue in operational existence forthe foreseeable future. Thusihe Member5 of Council continue to adopt the going concern t￿515 of accounting in DreDarin£ the financial ￿atemen[s. 1.3 Charltable fvnd$ Unrestritted funds a￿ available for use at the discretion of the Members of Council in furtherance of their charitable objectives unlessthe funds have bÉÈn designated for other purposes. DeSIg￿ted funds are unrestriaed funds earmarked by Ihe trustees for ￿nicular future project orcommitment. Re5tritted fund5 are sublecied to re5triciions on their expenditure declared bythe donor orthrough the tertns of an 3ppeal, and fall Into one of two sub-classÈs'. rÈsiritted Income funds or Èndowment funds. Endowmeni funds are subject to specific condiiions by donors Ihai th@ capital must be maintained by Ihe charity.

BOU Annu31 Report & Account5 | 2023141 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS FOR THE YEAR ENDED 31 DECEMBER 2023 Accountln8 policles Icontinuedl Income I Incoming resources are included In the siatemeni of fin8ncial activities wh&n entitlement has passed to thè ch8riry,' it is probable thatthe economic benefits associated with Ihe transaction will flow to the charity8nd the amount can be re113bly measured. The Income from doDatiOll5 or grants is recognised when there 15 evidence of entitletnent lo the gift. receipt 15 probable 3nd its amount ian be measured reliably. Legary income is recognised when recelpt Is probable and entitlement is est3blished. Income from donated goods is measured 8t the fbirv81ue of thegoods unless this is Impractical ro me8sure reli8bly, in which case the value 15 derived from rhe cosito the donor or the estimated resale value. Donaied facilitie5 and services are recognised in the account5 when received if thevalue can be reliably measured. No amounts are included for the contribution of general volunteer5. Intomè from contrarts for the supply of servitès is retognisÈd with thè delivery of ihe contrarted service. This is t13ssified 8$ unrÉstricid funds unless thre is a contrattual requirèmènt for it to be spènt on 8 p3rtitular purpose and returned If unspent, In which case It may be rÈ8arded as restritted. Expenditure Expenditure is recognised on an accruals basis as a liability Is incurred. Expenditure includes any VATwhich cannot be fully recovered. and is classified under headings of the statement of financial acrDiities to which li relate5'. Expenditure on raising funds include5 the cosrs of all fundraising activitie5, evenrs non-charitable trading activitie& and the sale of donated goods. Expènditure on t￿ritable attivitiès intludÈs all tosts incurred bya tharity in undÈrtaking artivitiÈs thÈt further its charitablè aimsforthe benefit of its benefici3riÉs. intludingthose support costs and tosts r*lating io thé governante of thè charity aPPOrtionÉd to th3ritable artiirities. allocated directly to ihat activity. Shared costs are apportioned between the 8CllVlties they contribute to on a reasonable,

BOU Annu31 Report & Account5 | 2023142 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng pollcles Icoitinuedl Overhead5 Overhe8d costs 8re 811ocated io Ihe relev8nt cost centres In the following proportions.. A F Langlord remuneratlon Lwalker remuneratlon S P Dudley remuneratlo Offlte tosts CoDference costs bhanagemeni administration 1546 4546 7.5% 47.5% 22.596 6096 22.5% 60% 37.586 45% 15 R￿earCh cosis 2.586 2.5% 2.5 10086 100% 100% 100% These proportions were decided upon bythe trustees, who believethat thèy represent a fair reflettion of the resources expended Flxed asset Investments Unlisied equity Investm&nts are initially recorded at COSL and subsequently measured at f8ir Value. If fair value cannot be relièbly measured. a55etsare measured at Cost le55 iTnpairmenL Llsted Inveaments are measured at falrvalue with changes In fair value being recognised in Income or exr*nditJre. Cash and cash equivalents C35h and cash equivalent5 include cash in hand, deposits held ai call with banks. oiher short-term liquid inve5ttnent5With original maturities of three monih5 Qr le55. and bank overdrafts. ￿nk overdraftsare Shown within borrowing5 in curreni liabilities. Financial instruments The (￿rIty has eletted 10 apply the provisions of Section I l Basic Financi81 Instruments, and Section 12'01her Fin8nci31 Instruments155ues' of FRS 102 ro all of its financial instruments. Financial Instruments are recognised in Ihe charitys balance sheÈt when the charity becomes partyto the contrartual provisions of the Instrument. Financial a55et5 and liabiliiie5 are off5ei. with the nei amounrs pre5enied in thefinancial 51atements. when ihere 15 a legal enforceable right to Sèt off the recognised amounts and there is an intention to settle on a net basis or to realisethe asset and Settle thÈ liability simultaneousty. 8trsi¢fin#n¢itsl#ssets Basic financial asset& which include debtor5 and cash balance5. are initially rne3sured attran5aCtion price including transaction costs and are subsequendy carried at amoriised cost using Ihe effertive Interest method unless the arrangement consiitutes a fin8ncing Ir8nsaction, where the tr8nsaction is measur&d 8t the present value of the future receipts discounted at a market raie of interesr. Financial assets classified as receivable within oneyear3re not amortised.

BOU Annu31 Report & Account5 | 2023143 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Accountlng pollcles Iconcinuedl P(r$i¢lirt•nti(rlli(rbiliti¢s constitutes a financing transaition, where the debi Instrumeni 15 measured aithe present value of the future payments d15counted at DÈbt instruments are subsequently carried at amoriised tost, using thè effettwÈ interest r3tÈ method. Trbde crediiors are obligations 10 pay for goods or services that have b@en acquired in Ihe ordinary course of operations fro m on-current IiBbilitie5. Trade creditor5 are recognised initially at tr3ll5action price and 5ub5equently me35ured at amort15ed c05t sing the effective interest method. Derecognition oAfinunri¢TI li¢Tbilities Finanoal liabilities are derecognised when the charitys contrauual obligaiions expire or are discharged or cancelled. Employee benefflts The cost of any unused holiday entitlement is recognised in the period in which the employeè's sèNices are received. Terminaiion benefits are recognised immediately as an expensewhen the charity is demonstrably commitied to ierminate the employment of employee orio provide ierrDin3tion benefit5. Critical accounting e5timate5 and judgements In the application of the charitys accounting policies, the Metnbersof Council are required to makejudgements. e5titnates and 355UtnptiQn5 aboutthe carrying arnount of assets liabilities th4t are not re4dily appareDI from oiher sourc￿. The e5tirDates and 3ssociaied assumpuons are basèd on hisiorical expèrienc? and oiher f3ciors thai are considèrèd to be relewani. Artual resulis may differ from these estimate5. The estimate5 and underlwfjg a55umptlOn5 are rvrfiewed on an ongoing ba515. Revisionsto accounting e5tirnates are recogni5ed in the period In which the estimate 15 revised whererhe ￿vIsion affetts only that period, or in the period of the revislon and future periods where the revision affec￿ boih current and future periods. Donatlon5 and legacies Unrestricied funds Restritted funds 2023 2022 Donations and gifts 1,395 36,657 1,395 36.657 10,738 37.229

BOU Annu31 Report & Account5 | 2023144 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 2023 2022 118,906 108,752 71 20,417 Other publication income Conference income 30.356 149.262 129,240 Investments Unrestricted fund5 Restritted fund5 Endowment fvnd5 general Total 2023 2022 Income from listed Investments Inrerest receivable 17,749 10,743 4,453 1,656 23,858 10.743 22,894 2,222 28.492 4,453 1,656 34,601 For the year ended 31 December 2022 19.321 4.323 1.472 Raising fund5 2023 2022 Managemeni costs- purchases Managemeni cosrs- wages and salaries Managemeni costs- employer's NIC M3n88emeni costs- pènsion costs 4,637 42,911 5,774 47.070 1,244 3,650 4.321 Fundraising and publicity 51,869 57,738 2023 2022 Rès*3rth- 3dministr8tion costs 1,574 60,097 32,166 59,281 46.723 Conference c05tS 93,837 107,865 Grant and bursary funding of activities (see note 81 Share of governance costs (see note 91 58,686 16.685 71,356 16,808 169.208 196.029

BOU Annu31 Report & Account5 | 2023145 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Grants and bursarles payable 2023 2022 Awards nine In 2022 C181re Bransion IPost-doctoral Research Assistani, University of Glasgow, U Andrea Estandia IPhD student, Edward Grey Instituie of Field Ornithology, UKI Katarzynalanas I￿515tant PrOf￿50r(adJun(tl. Polish Academy of Sciences, Po13ndl Rosannelose Michielsen IPhD siudent. Polish Academy of Science5. Poland) Gabriel Lopez SegowanolP05tdoc. Univer5idad Nacional Autonotna de Mexico. Mexico) Enriqueta Velarde (Senior Researcher. Universidad Veracruzana. Mexico) Akshay Bharadwaj IMa5ters student. Indian InstitLrte of Science. India) Federico De Pastalis (Postdottoral Associate. ISPR4 Italy) Mithall*2ierski IPhD studen¢ Unlversity of Oxford, UK) Veronica Méndez Aragtin IAcademic Director, Universiiy Centre of the Wesrfiords, Iceland) Kristen Wacker IPhD candidate, University of Michi8Èn, USI Klara K. Nordén IPhD siudenc Princeton University, US) Tere￿ Pegan IPhD student, University of Michigan, US) Anap15phaku Afan (Research Associate, A P Leveniis, Nigenal Roman Alberto Ruggera IProfesorAdjunto. Instituto de EcorregionesAndinas, Argentina) Chimalosiah Nwaoga Uunior Research Fellow. University of Groningen. Netherlands) Olufemi Olubodun IPhD student. FitzPatrick Institute of African Ornithology. South Africa) 1.498 1.950 1,500 iooo 1.915 1.974 1500 1,675 1,500 1,500 2,000 1,885 1,683 2,449 1.500 1500 1.955 Conference attendance award5 4,700 University of Tasmania Uohn & Pai W3rham Studentship- Paige GreÈnl McGIll Universiiy Uohn & Pai Warh3m Studentship- Emile Brisson-curadeaul Mon3sh Universiiy Uohn & Patwarham Studentship- Dr Rohan Clarke) University ol East Anglia, UK Uohn & Pat Warham Studeniship- knrsiy Franklinl Lancaster Univ&r51tylBrenda and Tony GibbsAward Stuart sharpl 9,289 25,095 8,669 30,747 14421 20,000 58.686 71.356 Support and governan¢e cos¢$ Support coas Governance cosrs 2023 2022 Audit fees Legal and prof￿510￿al Account8niy Costs of trusiees. and committee meetings Support orficÈrs honoraria 5.580 1.024 3,418 5,580 5,220 2.585 3,036 1,217 4,750 3,418 3,112 3,551 3,551 16.685 16.685 16.808 Analysed between 16,685 16,685 16,808 Governance costs includes paymentstothe auditors of £5.58012022- £5,220) for audit fees 4nd £3.41812022 £3,036lfor other sèNices.

BOU Annu31 Report & Account5 | 2023146 BOU BRITISH ORNITHOLOG15TS' UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 10 Members of Councll None of the Metnbersof Council lorary persons connected wilh therlll received any remuneration or benefiis from the charityduring theyear. During the year two of the Members of Council were reirnbursed expenses totalling£41712022- no members were reimbursed expenses). These expenses represenrtravelling c05rs incurred by the Members of Council in ihe performance of their dutie5. EmployeÈs Number of employees The average monthly number employees during the year was.. 2023 2022 Employment ¢osts 2023 2022 Wages and ￿larIeS social security Costs Other pension costs 78.231 84,488 2,222 6,809 86.214 93.519 No employee received employee benefits of more than £60,000 during theyearl2022- nill. 12 Net gainslllossesl on investments 2023 2022 Unrestricted Endowment fund5 funds Total Unrestricted Endowment funds fund5general Toial Revaluaiion of investmen 1,925 13,696 139,6441 110,2571 investments 117.6741 117,6741 15.9031 1.925 13.9781 139.6441 13 Taxation The charity is exetnp¢from tè% on income and gainsfalling wiihin section 505 of theTakes Att 1988 or seciion 252 of thpTaxa¢ion of Chargeable Gains Act 1992 to the extent that these are applied to Its charirable objec￿. 14 Flxed asset investments Cost or valuatlon At 113nu3ry 2023 Addition5 Valu3tion change5 Llsted Investment5 519,707 4.278 13.697 1130.0001 At 31 December 2023 407,682 Carrying amount At 31 December 2023 407.682 At 31 December 2022 519,707

BOU Annu31 Report & Account5 | 2023147 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 15 Financial instruments Carrying amount of financial assets Trade debiors 2023 2022 47.353 45,676 766 Other debtors Bank and tash 648.913 545,662 Measured at cost 697.384 592.104 sted Invèstmènts 407.682 519,707 Measured at tn3rketvalue 407.682 519,707 Carrylng amount of flnanclal Ilabllltles Othert3X3tion and sot131 securlty Actruals 604 17.982 Measured at lost 18.665 14,745 16 Debtors 2023 2022 Amounts fallingdue within one year.. Trade debtors orher dÈbiors Prepayments and accrDed incomè 47,353 1,118 7,253 45.676 766 1,260 55,724 47.702 17 Credltor5 Notes 2023 2022 Amounts falllngdue wlthln one year.. Othertaxation and social Security Deferred incotne 18 24.394 17,982 41,527 39,139

BOU Annu31 Report & Account5 | 2023148 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 18 Deferred Income 2023 2022 Other deferred Income 22,862 24,394 Deferred income relate5to subs(riptions re(eived in advance of £2D.64912022- £19,698) and income received in advancefor conferences in future years of £2.21312022_ £4.6961. 19 Pen$lon$ and Other post-retlremeni benefits Defined contrlbutlon penslon plans ConlributiOn5to defined contribution plans are recognised a5 an expense in the period in which the related service is provided. The charge to profit or loss in respect of defined contribution plans was £7.98312022 £6.8091. Restrirted fund5 The income fund5 of Ihe charity include restricted fund5 compri5ill8the followng unexpended ￿lanCeS of donations and grant5 held on trustfor specific purposes.. Movement in fund5120221 Incotne E¥penditure Balance at 1 lan 2022 Transfers Balanie at 31 Dec 2022 Research Fund john & Paiwarham scholarship Fund Brenda & Tony Gibbs 8equest Small grants 79.633 172,421 110,044 4.323 83.956 134,599 85,894 10,000 134,3841 13,4381 10,000 362,098 14.323 156,3391 15,6331 314,449 Movement In lund$120231 Income Expenditure Balance at Transfers Balance at 1 lan 2023 31 Dec 2023 ReSea￿h Fund john & Pat Warham Scholarship Fund Brenda & Tony Gibbs Bequest Small grants 83,956 134.599 85.894 10,000 4.453 88,409 91.728 84,052 7.002 138.9741 13.89 12,9981 314,449 4,453 143,64A I4,(￿￿) 271,191

BOU Annu31 Report & Account5 | 2023149 BOU Restricied funds Include the Research Fund. This includes the IncomÈ arising from invÈsimÈnts held in the Endowmen¢ Fund. Thelohn & Pat Warham schol8￿hlp Fund is to be used for research on Sphenisciform and Procellaniform seabirds and th@ income arising from Investments. The Brenda and Tony Gibbs Bequest is to be used for research on tracking and migration studies Including the use of newtechnologies. The transfer to the unrestricted fund represents an administration fee of10% of the grantS8warded from ihelohn and Pat Warham Scholarship Fund and the Brenda and Tony Gibbs BequesL The small grants fund represents a donation that was received in 2022 thai Is to be used io award small grants in futureyears.

BOU Annu31 Report & Account5 | 2023150 BOU BRITISH ORNITHOLOG15TS' UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 21 Endowmentfunds Endowment funds represent assets which must be held permanendy by the charity. Income arising on the endowment funds can be used in accordanc? wilh the obiecis of the ch8riryand is Included as resLricted Incom?. lthy capit81 gains or losses arising on Ihe assets form Part of the fund. Movement in funds120221 Expenditure Transfers Balance at 1 lan 2022 Income Revaluationsg3ins and losses Balance at 31 Dec 2022 L&MTFund Re5e3rch Fund 128.596 11.236 22,611 1.472 18.3721 121.696 10.610 21,352 Hutt Legacy 162,443 1,426 153,658 Movement in funds120231 Expendlture Transfers Revaluatlotts galns and losses Balante at Income Balan£e at 1 Jan 2023 31 Dec 2023 L&MTFund Re5eèrch Fund Hutt Lega(y 121.696 10.610 21.352 1.656 2.676 12491 126.028 10.361 20.850 153,658 1,656 157.239 The Landsborough and MaryThomson Research Fund IL & MT Fund) and the Hutt Lega(y repr&sentfunds set up by individual donors. The purpose of the L8MT Fund w3Stofund reseBrch. Income arising frorn the capital held in inve5ttnent5Within Endowment Fund5 15 credited to the restricted Research Fund. The Resèarch Fund represents permanent capit81, the Income from which Is Iransferred to the fund of the same name in Resiricted Funds to be spent solÈly on research activities lÈ.g. grants and bursariesl. The Hutl Legacy Is intended forthegeneral purpose5 ofthe Union and interest arising from this item 15 credited to General Unrestricred Fund5 which itself repre5ent5 investments and net assets which are held for the daily running and maintenance ofthe charity. Analy515 of neta55ets between funds 2023 Unrestrl£ted fund5 Restrlcted funds Endowment funds Total 2023 Fund balance5 ai 31 December 2023 are represented by.. Investments 250.443 391,919 157.239 407.682 663.110 642,362 157.239 I.D70.792

BOU Annu31 Report & Account5 | 2023151 BOU BRITISH ORNITHOLOGISTS, UNION NOTES TO THE FINANCIAL STATEMENTS ICONTINUEDI FOR THE YEAR ENDED 31 DECEMBER 2023 Analysls of netassets berneen funds Icontinuedl 2022 Unrestri(ted fund5 Re5tricred fund5 Endowtnent funds 2022 Fund balances at 31 December 2022 are represented by.. Investments 248,052 357,773 117,997 196,452 153,658 519,707 554,225 605.825 314.449 153.658 1.073.932 Flnanclal ¢ommltmeNs. guarantees and contlngent Ilabllltles During the year the charity awarded a grant tsf £20,000 from the Brenda & Tony Gibbs Beques¢ of which no payments had been made by theyear @nd. The proieci Is due to run from lanu3ry 2024 toluly 2025. During 2D22 the charity awarded the final john and Pai Warham Studentship grant of £8S,000 of whiih £54.253 is still to be wid to the recipient. This Student5hip 15 due to run from 2023 to 2027. Related party transactions There were no disclosable related party Iransaction5 during the year12022- none). Remuneratlon of key management personnel remuneration ofkey man8gement personnel Including employer pension contributions IS as follows.. 2023 2022 Aggreg8te CoMpen￿tion 48,570 56,154 Transactlons wlth related partles During the year paytnent5 of £4,79612022 £1,842lwere made to Profes50rl Gill. wife of G Appleton. a Trustee. Thi5 wa5for IBIS editorial 5ervice5 and the Ir4nsactiOn5 were on an arm5 length b35i5.