- Bahama Mockingbird
- Balearic Shearwater
- Bananaquit
- Bar-headed Goose
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Bay-breasted Warbler
- Bearded Vulture
- Berthelot's Pipit
- Black-crowned Night Heron
- Black-faced Grassquit
- Black-faced Ibis
- Black-headed Apalis
- Black-headed Gull
- Black-headed Heron
- Black-headed Oriole
- Black-headed Trogon
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Stilt
- Black-tailed Godwit
- Black-throated Loon
- Black-whiskered Vireo
- Black-winged Stilt
- Black Catbird
- Black Kite
- Black Redstart
- Black Sparrowhawk
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Blackburnian Warbler
- Blue-cheeked Bee-eater
- Blue-grey Gnatcatcher
- Blue-winged Teal
- Blue Rock Thrush
- Bluethroat
- Bonelli's Eagle
- Booted Eagle
- Brambling
- Brant Goose
- Bridled Quail-Dove
- Bridled Tern
- Bronzed Cowbird
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-hooded Gull
- Brown Noddy
- Brown Pelican
- Brown Skua (lonnbergi)
- Brown Trembler
- Buff-crested Bustard
- Burrowing Owl