- Baikal Teal
- Bald Eagle
- Bali Myna
- Bar-headed Goose
- Bar-shouldered Dove
- Bar-tailed Godwit
- Bare-faced Curassow
- Barn Swallow
- Barnacle Goose
- Barrow's Goldeneye
- Bateleur
- Bearded Barbet
- Bearded Reedling
- Bearded Vulture
- Beautiful Fruit Dove
- Bernier's Teal
- Black-bellied Whistling Duck
- Black-billed Magpie
- Black-capped Lory
- Black-casqued Hornbill
- Black-crowned Night Heron
- Black-faced Spoonbill
- Black-headed Gull
- Black-headed Parrot
- Black-headed Sibia
- Black-legged Kittiwake
- Black-naped Fruit Dove
- Black-necked Aracari
- Black-necked Crane
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Swan
- Black-tailed Godwit
- Black-tailed Gull
- Black-throated Finch
- Black-throated Laughingthrush
- Black-throated Loon
- Black-throated Magpie-Jay
- Black-winged Stilt
- Black Bulbul
- Black Crake
- Black Crowned Crane
- Black Grouse
- Black Guillemot
- Black Kite
- Black Mannikin
- Black Redstart
- Black Stork
- Black Swan
- Black Tern
- Black Woodpecker
- Blacksmith Lapwing
- Blue-and-yellow Macaw
- Blue-bellied Parrot
- Blue-bellied Roller
- Blue-billed Curassow
- Blue-billed Teal
- Blue-crowned Lorikeet
- Blue-eyed Cockatoo
- Blue-faced Honeyeater
- Blue-fronted Fig Parrot
- Blue-headed Macaw
- Blue-naped Mousebird
- Blue-necked Tanager
- Blue-streaked Lory
- Blue-throated Macaw
- Blue-winged Kookaburra
- Blue-winged Pitta
- Blue-winged Teal
- Blue Coua
- Blue Crane
- Blue Dacnis
- Bluethroat
- Blyth's Hornbill
- Bohemian Waxwing
- Booted Eagle
- Boreal Owl
- Bornean Crested Fireback
- Brahminy Starling
- Brambling
- Brant Goose
- Brant Goose (nigricans)
- Brazilian Tanager
- Brazilian Teal
- Brewer's Blackbird
- Brolga
- Brown-breasted Barbet
- Brown Wood Owl
- Budgerigar
- Bufflehead
- Buffy Fish Owl
- Bush Stone-curlew