- Circaetus fasciolatus — likely to require a substantial donation
- Circaetus gallicus — likely to require a substantial donation
- Circaetus pectoralis — likely to require a substantial donation
- Circus aeruginosus — likely to require a high donation
- Circus approximans — likely to require a high donation
- Circus assimilis — likely to require a high donation
- Circus buffoni — likely to require a high donation
- Circus cinereus — likely to require a high donation
- Circus cyaneus — likely to require a high donation
- Circus macrosceles — likely to require a high donation
- Circus macrourus — likely to require a high donation
- Circus maillardi — likely to require a high donation
- Circus maurus — likely to require a high donation
- Circus melanoleucos — likely to require a high donation
- Circus pygargus — likely to require a high donation
- Circus ranivorus — likely to require a high donation
- Circus spilonotus — likely to require a high donation
- Cissa chinensis — likely to require a substantial donation
- Cissa hypoleuca — likely to require a substantial donation
- Cissa thalassina — likely to require a substantial donation
- Cissopis leverianus — likely to require a high donation
- Cisticola aberdare — likely to require a high donation
- Cisticola aberrans — likely to require a high donation
- Cisticola angusticauda — likely to require a high donation
- Cisticola anonymus — likely to require a high donation
- Cisticola aridulus — likely to require a high donation
- Cisticola ayresii — likely to require a high donation
- Cisticola bodessa — likely to require a high donation
- Cisticola brachypterus — likely to require a high donation
- Cisticola brunnescens — likely to require a high donation
- Cisticola bulliens — likely to require a high donation
- Cisticola cantans — likely to require a high donation
- Cisticola carruthersi — likely to require a high donation
- Cisticola cherina — likely to require a high donation
- Cisticola chiniana — likely to require a high donation
- Cisticola chubbi — likely to require a high donation
- Cisticola cinereolus — likely to require a high donation
- Cisticola dambo — likely to require a high donation
- Cisticola discolor — likely to require a high donation
- Cisticola erythrops — likely to require a high donation
- Cisticola exilis — likely to require a high donation
- Cisticola eximius — likely to require a high donation
- Cisticola fulvicapilla — likely to require a high donation
- Cisticola galactotes — likely to require a high donation
- Cisticola guinea — likely to require a high donation
- Cisticola haesitatus — likely to require a high donation
- Cisticola hunteri — likely to require a high donation
- Cisticola juncidis — likely to require a high donation
- Cisticola lais — likely to require a high donation
- Cisticola lateralis — likely to require a high donation
- Cisticola melanurus — likely to require a high donation
- Cisticola nanus — likely to require a high donation
- Cisticola natalensis — likely to require a high donation
- Cisticola nigriloris — likely to require a high donation
- Cisticola njombe — likely to require a high donation
- Cisticola pipiens — likely to require a high donation
- Cisticola restrictus — likely to require a high donation
- Cisticola robustus — likely to require a high donation
- Cisticola ruficeps — likely to require a high donation
- Cisticola rufilatus — likely to require a high donation
- Cisticola rufus — likely to require a high donation
- Cisticola subruficapilla — likely to require a high donation
- Cisticola textrix — likely to require a high donation
- Cisticola tinniens — likely to require a high donation
- Cisticola troglodytes — likely to require a high donation
- Cisticola woosnami — likely to require a high donation
- Cistothorus apolinari — likely to require a high donation
- Cistothorus meridae — likely to require a high donation
- Cistothorus palustris — likely to require a high donation
- Cistothorus platensis — likely to require a high donation
- Cittura cyanotis — likely to require a high donation
- Cladorhynchus leucocephalus — likely to require a high donation
- Clamator coromandus — likely to require a high donation
- Clamator glandarius — likely to require a high donation
- Clamator jacobinus — likely to require a high donation
- Clamator levaillantii — likely to require a high donation
- Clangula hyemalis — likely to require a substantial donation
- Claravis godefrida — likely to require a high donation
- Claravis mondetoura — likely to require a high donation
- Claravis pretiosa — likely to require a high donation
- Cleptornis marchei — likely to require a high donation
- Clibanornis dendrocolaptoides — likely to require a high donation
- Climacteris affinis — likely to require a substantial donation
- Climacteris erythrops — likely to require a substantial donation
- Climacteris melanurus — likely to require a substantial donation
- Climacteris picumnus — likely to require a substantial donation
- Climacteris rufus — likely to require a substantial donation
- Clypicterus oseryi — likely to require a high donation
- Clytoceyx rex — likely to require a high donation
- Clytoctantes alixii — likely to require a high donation
- Clytoctantes atrogularis — likely to require a high donation
- Clytolaema rubricauda — likely to require a substantial donation
- Clytomyias insignis — likely to require a substantial donation
- Clytorhynchus hamlini — likely to require a high donation
- Clytorhynchus nigrogularis — likely to require a high donation
- Clytorhynchus pachycephaloides — likely to require a high donation
- Clytorhynchus sanctaecrucis — likely to require a high donation
- Clytorhynchus vitiensis — likely to require a high donation
- Clytospiza monteiri — likely to require a high donation
- Cnemarchus erythropygius — likely to require a high donation
- Cnemophilus loriae — likely to require a high donation
- Cnemophilus macgregorii — likely to require a substantial donation
- Cnemoscopus rubrirostris — likely to require a high donation
- Cnemotriccus fuscatus — likely to require a high donation
- Cnipodectes subbrunneus — likely to require a high donation
- Cnipodectes superrufus — likely to require a high donation
- Coccothraustes abeillei — likely to require a high donation
- Coccothraustes coccothraustes — likely to require a high donation
- Coccothraustes vespertinus — likely to require a high donation
- Coccycolius iris — likely to require a high donation
- Coccycua minuta — likely to require a high donation
- Coccyzus americanus — likely to require a high donation
- Coccyzus erythropthalmus — likely to require a high donation
- Coccyzus euleri — likely to require a high donation
- Coccyzus ferrugineus — likely to require a high donation
- Coccyzus lansbergi — likely to require a high donation
- Coccyzus longirostris — likely to require a high donation
- Coccyzus melacoryphus — likely to require a high donation
- Coccyzus merlini — likely to require a high donation
- Coccyzus minor — likely to require a high donation
- Coccyzus pluvialis — likely to require a high donation
- Coccyzus rufigularis — likely to require a high donation
- Coccyzus vetula — likely to require a high donation
- Coccyzus vieilloti — likely to require a high donation
- Cochlearius cochlearius — likely to require a substantial donation
- Cochoa azurea — likely to require a high donation
- Cochoa beccarii — likely to require a high donation
- Cochoa purpurea — likely to require a high donation
- Cochoa viridis — likely to require a high donation
- Coeligena bonapartei — likely to require a substantial donation
- Coeligena coeligena — likely to require a substantial donation
- Coeligena helianthea — likely to require a substantial donation
- Coeligena iris — likely to require a substantial donation
- Coeligena lutetiae — likely to require a substantial donation
- Coeligena orina — likely to require a substantial donation
- Coeligena phalerata — likely to require a substantial donation
- Coeligena prunellei — likely to require a substantial donation
- Coeligena torquata — likely to require a substantial donation
- Coeligena violifer — likely to require a substantial donation
- Coeligena wilsoni — likely to require a substantial donation
- Coenocorypha aucklandica — likely to require a substantial donation
- Coenocorypha pusilla — likely to require a substantial donation
- Coereba flaveola — likely to require a high donation
- Colaptes atricollis — likely to require a high donation
- Colaptes auricularis — likely to require a high donation
- Colaptes campestris — likely to require a high donation
- Colaptes chrysoides — likely to require a high donation
- Colaptes fernandinae — likely to require a high donation
- Colaptes melanochloros — likely to require a high donation
- Colaptes pitius — likely to require a high donation
- Colaptes punctigula — likely to require a high donation
- Colaptes rivolii — likely to require a high donation
- Colaptes rubiginosus — likely to require a high donation
- Colaptes rupicola — likely to require a high donation
- Colibri coruscans — likely to require a substantial donation
- Colibri delphinae — likely to require a substantial donation
- Colibri serrirostris — likely to require a substantial donation
- Colibri thalassinus — likely to require a substantial donation
- Colinus cristatus — likely to require a substantial donation
- Colinus leucopogon — likely to require a substantial donation
- Colinus nigrogularis — likely to require a substantial donation
- Colinus virginianus — likely to require a substantial donation
- Colius castanotus — likely to require a high donation
- Colius colius — likely to require a high donation
- Colius leucocephalus — likely to require a substantial donation
- Colius striatus — likely to require a high donation
- Collocalia bartschi — likely to require a high donation
- Collocalia brevirostris — likely to require a high donation
- Collocalia elaphra — likely to require a high donation
- Collocalia esculenta — likely to require a high donation
- Collocalia francica — likely to require a high donation
- Collocalia fuciphaga — likely to require a high donation
- Collocalia germani — likely to require a high donation
- Collocalia hirundinacea — likely to require a high donation
- Collocalia leucophaea — likely to require a high donation
- Collocalia linchi — likely to require a high donation
- Collocalia maxima — likely to require a high donation
- Collocalia ocista — likely to require a high donation
- Collocalia salangana — likely to require a high donation
- Collocalia sawtelli — likely to require a high donation
- Collocalia spodiopygia — likely to require a high donation
- Collocalia terraereginae — likely to require a high donation
- Collocalia troglodytes — likely to require a high donation
- Collocalia vanikorensis — likely to require a high donation
- Collocalia vulcanorum — likely to require a high donation
- Collocalia whiteheadi — likely to require a high donation
- Colluricincla boweri — likely to require a high donation
- Colluricincla harmonica — likely to require a high donation
- Colluricincla megarhyncha — likely to require a high donation
- Colluricincla sanghirensis — likely to require a high donation
- Colluricincla tenebrosa — likely to require a high donation
- Colluricincla woodwardi — likely to require a high donation
- Colonia colonus — likely to require a high donation
- Colorhamphus parvirostris — likely to require a high donation
- Columba albinucha — likely to require a high donation
- Columba albitorques — likely to require a high donation
- Columba argentina — likely to require a high donation
- Columba arquatrix — likely to require a high donation
- Columba bollii — likely to require a high donation
- Columba delegorguei — likely to require a high donation
- Columba elphinstonii — likely to require a high donation
- Columba eversmanni — likely to require a high donation
- Columba guinea — likely to require a high donation
- Columba hodgsonii — likely to require a high donation
- Columba iriditorques — likely to require a high donation
- Columba janthina — likely to require a high donation
- Columba junoniae — likely to require a high donation
- Columba leucomela — likely to require a high donation
- Columba leuconota — likely to require a high donation
- Columba malherbii — likely to require a high donation
- Columba oenas — likely to require a high donation
- Columba oliviae — likely to require a high donation
- Columba pallidiceps — likely to require a high donation
- Columba palumboides — likely to require a high donation
- Columba pollenii — likely to require a high donation
- Columba pulchricollis — likely to require a high donation
- Columba punicea — likely to require a high donation
- Columba rupestris — likely to require a high donation
- Columba sjostedti — likely to require a high donation
- Columba thomensis — likely to require a high donation
- Columba torringtoniae — likely to require a high donation
- Columba trocaz — likely to require a high donation
- Columba unicincta — likely to require a high donation
- Columba vitiensis — likely to require a high donation
- Columbina buckleyi — likely to require a high donation
- Columbina cruziana — likely to require a high donation
- Columbina cyanopis — likely to require a high donation
- Columbina inca — likely to require a high donation
- Columbina minuta — likely to require a high donation
- Columbina passerina — likely to require a high donation
- Columbina picui — likely to require a high donation
- Columbina squammata — likely to require a high donation
- Columbina talpacoti — likely to require a high donation
- Compsospiza baeri — likely to require a high donation
- Compsospiza garleppi — likely to require a high donation
- Compsothraupis loricata — likely to require a high donation
- Conioptilon mcilhennyi — likely to require a high donation
- Conirostrum albifrons — likely to require a high donation
- Conirostrum bicolor — likely to require a high donation
- Conirostrum cinereum — likely to require a high donation
- Conirostrum ferrugineiventre — likely to require a high donation
- Conirostrum leucogenys — likely to require a high donation
- Conirostrum margaritae — likely to require a high donation
- Conirostrum rufum — likely to require a high donation
- Conirostrum sitticolor — likely to require a high donation
- Conirostrum speciosum — likely to require a high donation
- Conirostrum tamarugense — likely to require a high donation
- Conopias albovittatus — likely to require a high donation
- Conopias cinchoneti — likely to require a high donation
- Conopias parvus — likely to require a high donation
- Conopias trivirgatus — likely to require a high donation
- Conopophaga ardesiaca — likely to require a substantial donation
- Conopophaga aurita — likely to require a high donation
- Conopophaga castaneiceps — likely to require a high donation
- Conopophaga cearae — likely to require a high donation
- Conopophaga lineata — likely to require a high donation
- Conopophaga melanogaster — likely to require a substantial donation
- Conopophaga melanops — likely to require a substantial donation
- Conopophaga peruviana — likely to require a high donation
- Conopophaga roberti — likely to require a substantial donation
- Conopophila albogularis — likely to require a high donation
- Conopophila rufogularis — likely to require a high donation
- Conopophila whitei — likely to require a high donation
- Conostoma oemodium — likely to require a high donation
- Conothraupis mesoleuca — likely to require a high donation
- Conothraupis speculigera — likely to require a high donation
- Contopus albogularis — likely to require a high donation
- Contopus caribaeus — likely to require a high donation
- Contopus cinereus — likely to require a high donation
- Contopus cooperi — likely to require a high donation
- Contopus fumigatus — likely to require a high donation
- Contopus hispaniolensis — likely to require a high donation
- Contopus latirostris — likely to require a high donation
- Contopus lugubris — likely to require a high donation
- Contopus nigrescens — likely to require a high donation
- Contopus ochraceus — likely to require a high donation
- Contopus pallidus — likely to require a high donation
- Contopus pertinax — likely to require a high donation
- Contopus punensis — likely to require a high donation
- Contopus sordidulus — likely to require a high donation
- Contopus virens — likely to require a high donation
- Copsychus albospecularis — likely to require a high donation
- Copsychus cebuensis — likely to require a high donation
- Copsychus luzoniensis — likely to require a high donation
- Copsychus malabaricus — likely to require a high donation
- Copsychus niger — likely to require a high donation
- Copsychus saularis — likely to require a high donation
- Copsychus sechellarum — likely to require a high donation
- Copsychus stricklandii — likely to require a high donation
- Coracias abyssinicus — likely to require a high donation
- Coracias benghalensis — likely to require a high donation
- Coracias caudatus — likely to require a high donation
- Coracias cyanogaster — likely to require a high donation
- Coracias garrulus — likely to require a high donation
- Coracias naevia — likely to require a high donation
- Coracias spatulatus — likely to require a high donation
- Coracias temminckii — likely to require a high donation
- Coracina abbotti — likely to require a high donation
- Coracina analis — likely to require a high donation
- Coracina atriceps — likely to require a high donation
- Coracina azurea — likely to require a high donation
- Coracina bicolor — likely to require a high donation
- Coracina boyeri — likely to require a high donation
- Coracina caeruleogrisea — likely to require a high donation
- Coracina caesia — likely to require a high donation
- Coracina caledonica — likely to require a high donation
- Coracina ceramensis — likely to require a high donation
- Coracina cinerea — likely to require a high donation
- Coracina coerulescens — likely to require a high donation
- Coracina dispar — likely to require a high donation
- Coracina dohertyi — likely to require a high donation
- Coracina fimbriata — likely to require a high donation
- Coracina fortis — likely to require a high donation
- Coracina graueri — likely to require a high donation
- Coracina holopolia — likely to require a high donation
- Coracina incerta — likely to require a high donation
- Coracina javensis — likely to require a high donation
- Coracina larvata — likely to require a high donation
- Coracina leucopygia — likely to require a high donation
- Coracina lineata — likely to require a high donation
- Coracina longicauda — likely to require a high donation
- Coracina macei — likely to require a high donation
- Coracina maxima — likely to require a high donation
- Coracina mcgregori — likely to require a high donation
- Coracina melanoptera — likely to require a high donation
- Coracina melas — likely to require a high donation
- Coracina melaschistos — likely to require a high donation
- Coracina mindanensis — likely to require a high donation
- Coracina montana — likely to require a high donation
- Coracina morio — likely to require a high donation
- Coracina newtoni — likely to require a high donation
- Coracina novaehollandiae — likely to require a high donation
- Coracina ostenta — likely to require a high donation
- Coracina papuensis — likely to require a high donation
- Coracina parvula — likely to require a high donation
- Coracina pectoralis — likely to require a high donation
- Coracina personata — likely to require a high donation
- Coracina polioptera — likely to require a high donation
- Coracina schistacea — likely to require a high donation
- Coracina schisticeps — likely to require a high donation
- Coracina striata — likely to require a high donation
- Coracina sula — likely to require a high donation
- Coracina temminckii — likely to require a high donation
- Coracina tenuirostris — likely to require a high donation
- Coracina typica — likely to require a high donation
- Coracopsis nigra — likely to require a substantial donation
- Coracopsis vasa — likely to require a substantial donation
- Coracornis raveni — likely to require a high donation
- Coragyps atratus — likely to require a substantial donation
- Corapipo altera — likely to require a high donation
- Corapipo gutturalis — likely to require a high donation
- Corapipo leucorrhoa — likely to require a high donation
- Corcorax melanorhamphos — likely to require a high donation
- Cormobates leucophaea — likely to require a substantial donation
- Cormobates placens — likely to require a substantial donation
- Corvinella corvina — likely to require a high donation
- Corvus albicollis — likely to require a substantial donation
- Corvus albus — likely to require a substantial donation
- Corvus bennetti — likely to require a substantial donation
- Corvus brachyrhynchos — likely to require a substantial donation
- Corvus capensis — likely to require a substantial donation
- Corvus caurinus — likely to require a substantial donation
- Corvus corone — likely to require a substantial donation
- Corvus coronoides — likely to require a substantial donation
- Corvus crassirostris — likely to require a substantial donation
- Corvus cryptoleucus — likely to require a substantial donation
- Corvus dauuricus — likely to require a substantial donation
- Corvus edithae — likely to require a substantial donation
- Corvus enca — likely to require a substantial donation
- Corvus florensis — likely to require a substantial donation
- Corvus frugilegus — likely to require a substantial donation
- Corvus fuscicapillus — likely to require a substantial donation
- Corvus hawaiiensis — likely to require a substantial donation
- Corvus imparatus — likely to require a substantial donation
- Corvus jamaicensis — likely to require a substantial donation
- Corvus kubaryi — likely to require a substantial donation
- Corvus leucognaphalus — likely to require a substantial donation
- Corvus levaillantii — likely to require a substantial donation
- Corvus macrorhynchos — likely to require a substantial donation
- Corvus meeki — likely to require a substantial donation
- Corvus mellori — likely to require a substantial donation
- Corvus minutus — likely to require a substantial donation
- Corvus monedula — likely to require a substantial donation
- Corvus nasicus — likely to require a substantial donation
- Corvus orru — likely to require a substantial donation
- Corvus ossifragus — likely to require a substantial donation
- Corvus palmarum — likely to require a substantial donation
- Corvus rhipidurus — likely to require a substantial donation
- Corvus ruficollis — likely to require a substantial donation
- Corvus sinaloae — likely to require a substantial donation
- Corvus splendens — likely to require a substantial donation
- Corvus torquatus — likely to require a substantial donation
- Corvus tristis — likely to require a substantial donation
- Corvus typicus — likely to require a substantial donation
- Corvus unicolor — likely to require a substantial donation
- Corvus validus — likely to require a substantial donation
- Corvus woodfordi — likely to require a substantial donation
- Corydon sumatranus — likely to require a substantial donation
- Coryphaspiza melanotis — likely to require a high donation
- Coryphistera alaudina — likely to require a high donation
- Coryphospingus cucullatus — likely to require a high donation
- Coryphospingus pileatus — likely to require a high donation
- Corythaeola cristata — likely to require a substantial donation
- Corythaixoides concolor — likely to require a high donation
- Corythaixoides leucogaster — likely to require a high donation
- Corythaixoides personatus — likely to require a high donation
- Corythopis delalandi — likely to require a high donation
- Corythopis torquatus — likely to require a high donation
- Coscoroba coscoroba — likely to require a substantial donation
- Cosmopsarus regius — likely to require a high donation
- Cosmopsarus unicolor — likely to require a high donation
- Cossypha albicapilla — likely to require a high donation
- Cossypha anomala — likely to require a high donation
- Cossypha archeri — likely to require a high donation
- Cossypha caffra — likely to require a high donation
- Cossypha cyanocampter — likely to require a high donation
- Cossypha dichroa — likely to require a high donation
- Cossypha heinrichi — likely to require a high donation
- Cossypha heuglini — likely to require a high donation
- Cossypha humeralis — likely to require a high donation
- Cossypha isabellae — likely to require a high donation
- Cossypha natalensis — likely to require a high donation
- Cossypha niveicapilla — likely to require a high donation
- Cossypha polioptera — likely to require a high donation
- Cossypha semirufa — likely to require a high donation
- Cossyphicula roberti — likely to require a high donation
- Cotinga amabilis — likely to require a high donation
- Cotinga cayana — likely to require a high donation
- Cotinga cotinga — likely to require a high donation
- Cotinga maculata — likely to require a high donation
- Cotinga maynana — likely to require a high donation
- Cotinga nattererii — likely to require a high donation
- Cotinga ridgwayi — likely to require a high donation
- Coturnicops exquisitus — likely to require a high donation
- Coturnicops notatus — likely to require a high donation
- Coturnicops noveboracensis — likely to require a substantial donation
- Coturnix coromandelica — likely to require a substantial donation
- Coturnix coturnix — likely to require a substantial donation
- Coturnix delegorguei — likely to require a substantial donation
- Coturnix japonica — likely to require a substantial donation
- Coturnix pectoralis — likely to require a substantial donation
- Coturnix ypsilophora — likely to require a substantial donation
- Coua caerulea — likely to require a high donation
- Coua coquereli — likely to require a high donation
- Coua cristata — likely to require a high donation
- Coua cursor — likely to require a high donation
- Coua gigas — likely to require a high donation
- Coua reynaudii — likely to require a high donation
- Coua ruficeps — likely to require a high donation
- Coua serriana — likely to require a high donation
- Coua verreauxi — likely to require a high donation
- Cracticus cassicus — likely to require a high donation
- Cracticus louisiadensis — likely to require a high donation
- Cracticus mentalis — likely to require a high donation
- Cracticus nigrogularis — likely to require a high donation
- Cracticus quoyi — likely to require a high donation
- Cracticus torquatus — likely to require a high donation
- Cranioleuca albicapilla — likely to require a high donation
- Cranioleuca albiceps — likely to require a high donation
- Cranioleuca antisiensis — likely to require a high donation
- Cranioleuca baroni — likely to require a high donation
- Cranioleuca curtata — likely to require a high donation
- Cranioleuca demissa — likely to require a high donation
- Cranioleuca dissita — likely to require a high donation
- Cranioleuca erythrops — likely to require a high donation
- Cranioleuca gutturata — likely to require a high donation
- Cranioleuca hellmayri — likely to require a high donation
- Cranioleuca henricae — likely to require a high donation
- Cranioleuca marcapatae — likely to require a high donation
- Cranioleuca muelleri — likely to require a high donation
- Cranioleuca obsoleta — likely to require a high donation
- Cranioleuca pallida — likely to require a high donation
- Cranioleuca pyrrhophia — likely to require a high donation
- Cranioleuca semicinerea — likely to require a high donation
- Cranioleuca subcristata — likely to require a high donation
- Cranioleuca sulphurifera — likely to require a high donation
- Cranioleuca vulpecula — likely to require a high donation
- Cranioleuca vulpina — likely to require a high donation
- Crateroscelis murina — likely to require a high donation
- Crateroscelis nigrorufa — likely to require a high donation
- Crateroscelis robusta — likely to require a high donation
- Crax alberti — likely to require a substantial donation
- Crax alector — likely to require a substantial donation
- Crax blumenbachii — likely to require a substantial donation
- Crax daubentoni — likely to require a substantial donation
- Crax fasciolata — likely to require a substantial donation
- Crax globulosa — likely to require a substantial donation
- Crax rubra — likely to require a substantial donation
- Creagrus furcatus — likely to require a high donation
- Creatophora cinerea — likely to require a high donation
- Crecopsis egregia — likely to require a high donation
- Creurgops dentatus — likely to require a high donation
- Creurgops verticalis — likely to require a high donation
- Crex crex — likely to require a substantial donation
- Crinifer piscator — likely to require a high donation
- Crinifer zonurus — likely to require a high donation
- Criniger barbatus — likely to require a high donation
- Criniger calurus — likely to require a high donation
- Criniger chloronotus — likely to require a high donation
- Criniger ndussumensis — likely to require a high donation