- Bald Eagle
- Bali Myna
- Bananaquit
- Band-bellied Owl
- Band-tailed Pigeon
- Bar-headed Goose
- Bare-faced Ground Dove
- Barn Swallow
- Barnacle Goose
- Barrow's Goldeneye
- Bateleur
- Bearded Barbet
- Bewick's Wren
- Black-bellied Whistling Duck
- Black-billed Magpie
- Black-capped Chickadee
- Black-capped Donacobius
- Black-cheeked Lovebird
- Black-chested Buzzard-Eagle
- Black-collared Hawk
- Black-crowned Night Heron
- Black-faced Grassquit
- Black-faced Ibis
- Black-headed Grosbeak
- Black-headed Gull
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Swan
- Black-tailed Godwit
- Black-throated Flowerpiercer
- Black-winged Kite
- Black-winged Stilt
- Black Kite
- Black Phoebe
- Black Redstart
- Black Skimmer
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Black Woodpecker
- Blackish Oystercatcher
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-grey Gnatcatcher
- Blue-grey Tanager
- Blue-throated Piping Guan
- Blue-winged Macaw
- Blue-winged Teal
- Blue Jay
- Bluethroat
- Boat-billed Heron
- Brambling
- Brandt's Cormorant
- Brant Goose
- Brewer's Blackbird
- Bridled Quail-Dove
- Broad-tailed Hummingbird
- Brown-headed Cowbird
- Brown-hooded Gull
- Brown Pelican
- Brown Trembler
- Budgerigar
- Burrowing Parrot