- Bachman's Warbler
- Bald Eagle
- Bananaquit
- Band-backed Wren
- Banded Wren
- Bar-winged Wood Wren
- Barnacle Goose
- Barred Owl
- Bateleur
- Bay-breasted Cuckoo
- Bay-breasted Warbler
- Bay Wren
- Beach Stone-curlew
- Beautiful Fruit Dove
- Belted Kingfisher
- Bendire's Thrasher
- Bewick's Wren
- Bicknell's Thrush
- Bicolored Wren
- Black-and-white Warbler
- Black-and-yellow Broadbill
- Black-and-yellow Phainoptila
- Black-backed Woodpecker
- Black-bellied Wren
- Black-capped Donacobius
- Black-chinned Hummingbird
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-tailed Gull
- Black-throated Blue Warbler
- Black-throated Wren
- Black Catbird
- Black Grouse
- Black Phoebe
- Black Scoter
- Black Tern
- Black Woodpecker
- Blackburnian Warbler
- Blood Pheasant
- Blue-and-white Mockingbird
- Blue-billed Teal
- Blue-crowned Hanging Parrot
- Blue-winged Teal
- Blue Grosbeak
- Blue Jay
- Blue Mockingbird
- Boat-billed Flycatcher
- Boat-billed Heron
- Boat-tailed Grackle
- Bobolink
- Bohemian Waxwing
- Boreal Chickadee
- Boucard's Wren
- Bridled Tern
- Bright-rumped Attila
- Broad-winged Hawk
- Brown-backed Mockingbird
- Brown-eared Bulbul
- Brown Booby
- Brown Dipper
- Brown Thrasher
- Brown Trembler
- Buff-breasted Wren
- Buff-fronted Owl
- Bufflehead
- Burrowing Owl