- Archer's Ground Robin
- Archer's Lark
- Archer's Robin-Chat
- Archer's Robin Chat
- Archilochus
- Archilochus alexandri
- Archilochus colubris
- Arctic Diver
- Arctic Loon
- Arctic Redpoll
- Arctic Skua
- Arctic Tern
- Arctic Warbler
- Ardea Alba
- Ardea Cinerea
- Ardea Herodius
- Ardea Intermedia
- Ardea Purpurea
- Ardea alba
- Ardea alba egretta
- Ardea alba modesta
- Ardea bournei
- Ardea cinerea
- Ardea cinerea cinerea
- Ardea cinerea jouyi
- Ardea cocoi
- Ardea goliath
- Ardea herodias
- Ardea herodias herodias
- Ardea herodias occidentalis
- Ardea humbloti
- Ardea ibis
- Ardea insignis
- Ardea intermedia
- Ardea melanocephala
- Ardea modesta
- Ardea novaehollandiae
- Ardea pacifica
- Ardea picata
- Ardea purpurea
- Ardea purpurea madagascariensis
- Ardea sumatrana
- Ardeidae
- Ardenna
- Ardenna bulleri
- Ardenna carneipes
- Ardenna creatopus
- Ardenna gravis
- Ardenna grisea
- Ardenna pacifica
- Ardenna tenuirostris
- Ardeola
- Ardeola bacchus
- Ardeola grayii
- Ardeola idae
- Ardeola ralloides
- Ardeola rufiventris
- Ardeola speciosa
- Ardeola striatus
- Ardeotis
- Ardeotis Kori
- Ardeotis arabs
- Ardeotis australis
- Ardeotis kori
- Ardeotis kori struthiunculus
- Ardeotis nigriceps
- Arenal Area
- Arenaria
- Arenaria Interpres
- Arenaria interpres
- Arenaria interpres interpres
- Arenaria melanocephala
- Arenzano
- Arenzano, close to Genoa, Liguria(Italy)
- Arfak Astrapia
- Arfak Berrypecker
- Arfak Bird-of-paradise
- Arfak Buff-faced Scrubwren
- Arfak Buff-faced Sericornis
- Arfak Catbird
- Arfak Honeyeater
- Arfak Melidectes
- Arfak Owlet-nightjar
- Arfak Parotia
- Arfak Scrubwren
- Arfak Six-plumed Bird-of-paradise
- Arfak Six-plumed Bird of paradise
- Argentina
- Argentine Ruddy-Duck
- Argusianus
- Argusianus argus
- Argya
- Argya altirostris
- Argya aylmeri
- Argya caudata
- Argya earlei
- Argya fulva
- Argya huttoni
- Argya malcolmi
- Argya squamiceps
- Argya striata
- Argya striata orientalis
- Argya subrufa
- Argyll
- Ariel toucan
- Aripuana Antwren
- Arizelocichla
- Arizelocichla chlorigula
- Arizelocichla fusciceps
- Arizelocichla kakamegae
- Arizelocichla kikuyuensis
- Arizelocichla masukuensis
- Arizelocichla milanjensis
- Arizelocichla montana
- Arizelocichla montanus
- Arizelocichla neumanni
- Arizelocichla nigriceps
- Arizelocichla olivaceiceps
- Arizelocichla striifacies
- Arizelocichla tephrolaema
- Arizelocichla tephrolaemus
- Arizona
- Arizona Mountain Kingsnake
- Arizona Woodpecker
- Arjeplog
- Arjeplog Sweden
- Arkansas
- Armash Fishponds
- Armash Fishponds Armenia
- Armenia
- Armenian Gull
- Armstrong Park
- Arne
- Arne RSPB (England)
- Arne RSPB Reserve
- Arnot's Chat
- Arnott's Chat
- Arremon
- Arremon abeillei
- Arremon assimilis
- Arremon atricapillus
- Arremon aurantiirostris
- Arremon basilicus
- Arremon brunneinucha
- Arremon castaneiceps
- Arremon costaricensis
- Arremon crassirostris
- Arremon flavirostris
- Arremon franciscanus
- Arremon perijanus
- Arremon phaeopleurus
- Arremon phygas
- Arremon schlegeli
- Arremon semitorquatus
- Arremon taciturnus
- Arremon torquatus
- Arremon virenticeps
- Arremonops
- Arremonops chloronotus
- Arremonops conirostris
- Arremonops rufivirgatus
- Arremonops tocuyensis
- Arrocampo Reservoir
- Arrow-headed Warbler
- Arrow-marked Babbler
- Arrow Babbler
- Arrowhead Marsh
- Arrowhead Piculet
- Arrowhead Warbler
- Arses
- Arses insularis
- Arses kaupi
- Arses lorealis
- Arses telescophthalmus
- Arses telescopthalmus
- Arta Mountains
- Arta Mountains (Mallorca, Balearic Islands)
- Artamella
- Artamella viridis
- Artamidae
- Artamus
- Artamus cinereus
- Artamus cinereus melanops
- Artamus cyanopterus
- Artamus cyanopterus cyanopterus
- Artamus fuscus
- Artamus insignis
- Artamus leucorhynchus
- Artamus leucorynchus
- Artamus leucorynchus leucorynchus
- Artamus maximus
- Artamus mentalis
- Artamus minor
- Artamus monachus
- Artamus personatus
- Artamus superciliosus
- Artemisiospiza
- Artemisiospiza belli
- Artemisiospiza nevadensis
- Artisornis
- Artisornis metopias
- Artisornis moreaui
- Aru
- Aru Island Racquet-tail
- Aru Islands
- Aru Paradise-Kingfisher
- Aru Paradise Kingfisher
- Aruba
- Arundel WWT
- Arundel Wetland Centre
- Arundinax
- Arundinax aedon
- Arundinicola
- Arundinicola leucocephala
- Arusha National Park
- Asa Wright
- Asa Wright Nature Centre
- Asa Wright Nature Centre (Trinidad)
- Asarcornis
- Asarcornis scutulata
- Ascension Frigatebird
- Ascension Island Frigatebird
- Asemospiza obscura
- Ash's Lark
- Ash-breasted Antbird
- Ash-breasted Sierra-Finch
- Ash-breasted Sierra-finch
- Ash-breasted Sierra Finch
- Ash-breasted Tit-Tyrant
- Ash-breasted Tit Tyrant
- Ash-browed Spinetail
- Ash-colored Cuckoo
- Ash-colored Tapaculo
- Ash-coloured Cuckoo
- Ash-throated Antwren
- Ash-throated Casiornis
- Ash-throated Crake
- Ash-throated Flycatcher
- Ash-throated Gnateater
- Ash-winged Antwren
- Ashambu Laughingthrush
- Ashbyia
- Ashbyia lovensis
- Ashdown Forest
- Ashy-bellied White-eye
- Ashy-breasted Flycatcher
- Ashy-crowned Babbler
- Ashy-crowned Finch-Lark
- Ashy-crowned Sparrow-Lark
- Ashy-crowned Sparrow-lark
- Ashy-crowned Sparrow Lark
- Ashy-eared Parrotbill
- Ashy-faced Owl
- Ashy-fronted Bulbul
- Ashy-headed Babbler
- Ashy-headed Goose
- Ashy-headed Green-Pigeon
- Ashy-headed Green Pigeon
- Ashy-headed Greenlet
- Ashy-headed Laughing-thrush
- Ashy-headed Laughingthrush
- Ashy-headed Myna
- Ashy-headed Starling
- Ashy-headed Tyrannulet
- Ashy-headed Wagtail
- Ashy-tailed Swift
- Ashy-throated Bush-Tanager
- Ashy-throated Bush Tanager
- Ashy-throated Chlorospingus
- Ashy-throated Leaf-Warbler
- Ashy-throated Leaf Warbler
- Ashy-throated Parrotbill
- Ashy-throated Tanager Finch
- Ashy-throated Warbler
- Ashy Alseonax
- Ashy Antwren
- Ashy Bulbul
- Ashy Cisticola
- Ashy Cuckoo-shrike
- Ashy Cuckooshrike
- Ashy Drongo
- Ashy Flowerpecker
- Ashy Flycatcher
- Ashy Gerygone
- Ashy Ground-Thrush
- Ashy Ground Thrush
- Ashy Laughingthrush
- Ashy Minivet
- Ashy Myzomela
- Ashy Prinia
- Ashy Robin
- Ashy Starling
- Ashy Storm-Petrel
- Ashy Storm Petrel
- Ashy Swallow-Shrike
- Ashy Tailorbird
- Ashy Thornbill
- Ashy Thrush
- Ashy Tit
- Ashy Wood-Pigeon
- Ashy Wood-swallow
- Ashy Wood Pigeon
- Ashy Wood Swallow
- Ashy Woodpecker
- Ashy Woodpigeon
- Ashy Woodswallow
- Ashy Woodswallow Shrike
- Asia
- Asia Minor
- Asian Barred Owlet
- Asian Black-headed Oriole
- Asian Black Eagle
- Asian Black Hornbill
- Asian Brown Flycatcher
- Asian Crested Goshawk
- Asian Crimson-winged Finch
- Asian Darter
- Asian Desert Sparrow
- Asian Desert Warbler
- Asian Dowitcher
- Asian Drongo-Cuckoo
- Asian Drongo Cuckoo
- Asian Elephant
- Asian Emerald-Cuckoo
- Asian Emerald Cuckoo
- Asian Emerald Dove
- Asian Fairy-Bluebird
- Asian Fairy-bluebird
- Asian Fairy Bluebird
- Asian Glossy Starling
- Asian Golden Weaver
- Asian House-Martin
- Asian House Martin
- Asian Jackdaw
- Asian King Vulture
- Asian Koel
- Asian Lesser Cuckoo
- Asian Magpie-Robin
- Asian Martin
- Asian Open-bill Stork
- Asian Openbill
- Asian Palm-Swift
- Asian Palm Swift
- Asian Paradise-Flycatcher
- Asian Paradise Flycatcher


