- Abdim's Stork
- Abyssinian Sunbird
- Abyssinian White-eye
- Acorn Woodpecker
- African Blue Tit
- African Desert Warbler
- African Paradise Flycatcher
- African Sacred Ibis
- African Silverbill
- Aleutian Tern
- Alpine Accentor
- Alpine Chough
- American Avocet
- American Bittern
- American Black Duck
- American Cliff Swallow
- American Coot
- American Crow
- American Dipper
- American Golden Plover
- American Herring Gull
- American Pipit
- American Pygmy Kingfisher
- American Robin
- American Tree Sparrow
- American Wigeon
- American Yellow Warbler
- Anhinga
- Anna's Hummingbird
- Apostlebird
- Arabian Babbler
- Arabian Green Bee-eater
- Arabian Partridge
- Arabian Scops Owl
- Arabian Wheatear
- Arafura Shrikethrush
- Arctic Tern
- Arctic Warbler
- Asian Brown Flycatcher
- Asian Desert Warbler
- Asian Green Bee-eater
- Asian Rosy Finch
- Asian Short-toed Lark
- Atlantic Puffin
- Atoll Fruit Dove
- Audouin's Gull
- Australasian Darter
- Australasian Figbird
- Australasian Grebe
- Australasian Swamphen
- Australian Brushturkey
- Australian Bustard
- Australian Magpie
- Australian Pelican
- Australian Pipit
- Australian Pratincole
- Australian White Ibis
- Azure Tit