- Baillon's Crake
- Baird's Sandpiper
- Bald Eagle
- Balearic Shearwater
- Balearic Warbler
- Baltimore Oriole
- Bananaquit
- Band-tailed Seedeater
- Band-tailed Sierra Finch
- Bank Myna
- Bar-headed Goose
- Bar-tailed Godwit
- Barbary Partridge
- Bare-faced Ground Dove
- Bare-faced Ibis
- Barn Swallow
- Barnacle Goose
- Barred Warbler
- Barrow's Goldeneye
- Bateleur
- Bay-backed Shrike
- Bay-breasted Warbler
- Bearded Reedling
- Bearded Vulture
- Belted Kingfisher
- Berthelot's Pipit
- Black-and-rufous Warbling Finch
- Black-and-white Mannikin
- Black-and-white Warbler
- Black-backed Grosbeak
- Black-backed Puffback
- Black-banded Woodcreeper
- Black-bellied Sandgrouse
- Black-bellied Starling
- Black-billed Shrike-Tyrant
- Black-capped Chickadee
- Black-capped Donacobius
- Black-capped Warbling Finch
- Black-chested Buzzard-Eagle
- Black-chested Snake Eagle
- Black-collared Barbet
- Black-collared Hawk
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-fronted Piping Guan
- Black-goggled Tanager
- Black-headed Bunting
- Black-headed Duck
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Oriole
- Black-headed Weaver
- Black-hooded Sierra Finch
- Black-legged Kittiwake
- Black-necked Grebe
- Black-necked Swan
- Black-rumped Flameback
- Black-tailed Godwit
- Black-tailed Tityra
- Black-throated Blue Warbler
- Black-throated Green Warbler
- Black-throated Loon
- Black-throated Mango
- Black-winged Ground Dove
- Black-winged Kite
- Black-winged Stilt
- Black Bittern
- Black Crake
- Black Cuckooshrike
- Black Drongo
- Black Francolin
- Black Grouse
- Black Guillemot
- Black Harrier
- Black Jacobin
- Black Kite
- Black Phoebe
- Black Redstart
- Black Saw-wing
- Black Scoter
- Black Skimmer
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Black Wheatear
- Black Woodpecker
- Blackburnian Warbler
- Blackpoll Warbler
- Blacksmith Lapwing
- Blue-and-yellow Tanager
- Blue-billed Teal
- Blue-crowned Parakeet
- Blue-tailed Bee-eater
- Blue-tufted Starthroat
- Blue-winged Teal
- Blue Dacnis
- Blue Ground Dove
- Blue Jay
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Bluish-grey Saltator
- Boat-billed Flycatcher
- Bobolink
- Bohemian Waxwing
- Bokmakierie
- Bolle's Pigeon
- Bonaparte's Gull
- Bonelli's Eagle
- Booted Eagle
- Boreal Owl
- Brambling
- Bran-colored Flycatcher
- Brant Goose
- Brazilian Teal
- Broad-billed Sandpiper
- Broad-winged Hawk
- Bronze-winged Jacana
- Bronze Mannikin
- Brown-and-yellow Marshbird
- Brown-backed Mockingbird
- Brown-capped Tit-Spinetail
- Brown-capped Whitestart
- Brown-crested Flycatcher
- Brown-headed Barbet
- Brown-headed Cowbird
- Brown-hooded Gull
- Brown-hooded Kingfisher
- Brown-throated Martin
- Brown Creeper
- Brown Rock Chat
- Brown Scrub Robin
- Brown Snake Eagle
- Buff-necked Ibis
- Buff-winged Cinclodes
- Bufflehead
- Burchell's Coucal
- Burchell's Starling
- Burrowing Owl
- Burrowing Parrot