- Baikal Teal
- Bananaquit
- Bar-headed Goose
- Bare-necked Fruitcrow
- Bare-throated Tiger Heron
- Barnacle Goose
- Barred Hawk
- Bay-headed Tanager
- Bay Woodpecker
- Baya Weaver
- Bearded Barbet
- Black-and-white Mannikin
- Black-and-white Warbler
- Black-bellied Whistling Duck
- Black-billed Turaco
- Black-browed Barbet
- Black-capped Flycatcher
- Black-capped Lory
- Black-collared Starling
- Black-crowned Night Heron
- Black-headed Gull
- Black-headed Ibis
- Black-naped Fruit Dove
- Black-necked Aracari
- Black-necked Crane
- Black-necked Stilt
- Black-necked Stork
- Black-necked Swan
- Black-throated Laughingthrush
- Black-winged Starling
- Black Baza
- Black Crowned Crane
- Black Eagle
- Black Kite
- Black Redstart
- Black Stork
- Black Swan
- Blue-and-yellow Macaw
- Blue-bellied Roller
- Blue-billed Teal
- Blue-breasted Kingfisher
- Blue-capped Cordon-bleu
- Blue-crowned Hanging Parrot
- Blue-faced Honeyeater
- Blue-grey Tanager
- Blue-naped Mousebird
- Blue-streaked Lory
- Blue-tailed Bee-eater
- Blue-throated Toucanet
- Blue-winged Teal
- Blue Crane
- Blue Manakin
- Blyth's Hornbill
- Boat-billed Heron
- Bohemian Waxwing
- Brahminy Kite
- Brahminy Starling
- Brazilian Tanager
- Brazilian Teal
- Broad-billed Roller
- Brolga
- Bronze-winged Jacana
- Brown Jay
- Buff-rumped Warbler
- Buff-throated Saltator
- Bufflehead
- Bush Stone-curlew