- Abbott's Babbler
- Abdim's Stork
- Abyssinian Ground Hornbill
- Abyssinian Slaty Flycatcher
- Abyssinian White-eye
- Acadian Flycatcher
- Adelaide's Warbler
- African Black Duck
- African Black Swift
- African Blue Flycatcher
- African Citril
- African Collared Dove
- African Crake
- African Darter
- African Dusky Flycatcher
- African Dwarf Kingfisher
- African Emerald Cuckoo
- African Finfoot
- African Firefinch
- African Fish Eagle
- African Goshawk
- African Green Pigeon
- African Grey Hornbill
- African Harrier-Hawk
- African Hawk-Eagle
- African Jacana
- African Marsh Harrier
- African Olive Pigeon
- African Openbill
- African Oystercatcher
- African Palm Swift
- African Penguin
- African Piculet
- African Pied Hornbill
- African Pied Wagtail
- African Pipit
- African Pygmy Kingfisher
- African Rail
- African Reed Warbler
- African Rock Pipit
- African Sacred Ibis
- African Scops Owl
- African Shrike-flycatcher
- African Skimmer
- African Snipe
- African Spoonbill
- African Stonechat
- African Swamphen
- African Thrush
- African Wattled Lapwing
- African Yellow Warbler
- Agami Heron
- Agile Tit-Tyrant
- Alexandrine Parakeet
- Alpine Chough
- Alpine Swift
- Alpine Thrush
- Altai Accentor
- Amazon Kingfisher
- Amboyna Cuckoo-Dove
- American Black Swift
- American Cliff Swallow
- American Coot
- American Flamingo
- American Kestrel
- American Oystercatcher
- American Pygmy Kingfisher
- American Redstart
- Amethyst Sunbird
- Amur Falcon
- Amur Stonechat
- Andean Cock-of-the-rock
- Andean Condor
- Andean Duck
- Andean Emerald
- Andean Guan
- Andean Motmot
- Andean Siskin
- Andean Slaty Thrush
- Andean Teal
- Andean Tit-Spinetail
- Angola Swallow
- Anhinga
- Ankober Serin
- Ant-eating Chat
- Antillean Crested Hummingbird
- Antillean Euphonia
- Antillean Palm Swift
- Antillean Piculet
- Antipodean Albatross
- Apo Myna
- Apo Sunbird
- Apolinar's Wren
- Apostlebird
- Appert's Tetraka
- Arabian Bustard
- Archbold's Bowerbird
- Archbold's Newtonia
- Arctic Redpoll
- Arctic Tern
- Arctic Warbler
- Arrow-marked Babbler
- Ash-colored Cuckoo
- Ashy-crowned Sparrow-Lark
- Ashy-headed Goose
- Ashy-throated Warbler
- Ashy Drongo
- Ashy Flycatcher
- Ashy Minivet
- Ashy Myzomela
- Ashy Prinia
- Ashy Thrush
- Ashy Woodpecker
- Ashy Woodswallow
- Asian Barred Owlet
- Asian Brown Flycatcher
- Asian Crimson-winged Finch
- Asian Desert Warbler
- Asian Emerald Cuckoo
- Asian Fairy-bluebird
- Asian Green Bee-eater
- Asian House Martin
- Asian Koel
- Asian Openbill
- Asian Palm Swift
- Asian Short-toed Lark
- Asian Stubtail
- Atlantic Puffin
- Auckland Teal
- Audouin's Gull
- Augur Buzzard
- Austral Blackbird
- Austral Canastero
- Austral Negrito
- Austral Parakeet
- Austral Pygmy Owl
- Austral Thrush
- Australasian Darter
- Australasian Figbird
- Australasian Gannet
- Australasian Grebe
- Australasian Shoveler
- Australasian Swamphen
- Australian Boobook
- Australian Crake
- Australian Golden Whistler
- Australian Hobby
- Australian King Parrot
- Australian Magpie
- Australian Owlet-nightjar
- Australian Painted-snipe
- Australian Pelican
- Australian Pied Cormorant
- Australian Pipit
- Australian Pratincole
- Australian Raven
- Australian Reed Warbler
- Australian Ringneck
- Australian Shelduck
- Australian White Ibis
- Azara's Spinetail
- Azure-breasted Pitta
- Azure-winged Magpie
- Azure Tit