- Baltimore Oriole
- Bananaquit
- Bar-headed Goose
- Bar-tailed Godwit
- Bare-throated Tiger Heron
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Beautiful Sunbird
- Black-and-white Mannikin
- Black-and-white Warbler
- Black-capped Chickadee
- Black-capped Donacobius
- Black-chested Buzzard-Eagle
- Black-chinned Siskin
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-faced Grassquit
- Black-faced Ibis
- Black-headed Gull
- Black-legged Kittiwake
- Black-naped Oriole
- Black-necked Aracari
- Black-necked Stilt
- Black-necked Swan
- Black-rumped Waxbill
- Black-tailed Godwit
- Black-tailed Trogon
- Black-winged Stilt
- Black Bittern
- Black Drongo
- Black Guan
- Black Jacobin
- Black Kite
- Black Redstart
- Black Vulture
- Blackpoll Warbler
- Blue-and-yellow Macaw
- Blue-black Grassquit
- Blue-black Grosbeak
- Blue-grey Tanager
- Blue-headed Parrot
- Boat-billed Flycatcher
- Bonaparte's Gull
- Boreal Chickadee
- Brahminy Kite
- Brant Goose
- Brazilian Teal
- Brewer's Blackbird
- Broad-winged Hawk
- Bronze-tailed Starling
- Bronze Mannikin
- Brown-headed Gull
- Brown-hooded Gull
- Brown-throated Parakeet
- Brown-throated Sunbird
- Brown Booby
- Brown Jay
- Brown Pelican
- Buff-throated Saltator
- Bushy-crested Hornbill