- Baillon's Crake
- Baird's Sandpiper
- Baird's Trogon
- Bald Eagle
- Balearic Shearwater
- Baltimore Oriole
- Bananaquit
- Band-backed Wren
- Band-tailed Barbthroat
- Band-tailed Guan
- Band-tailed Pigeon
- Band-tailed Seedeater
- Band-tailed Sierra Finch
- Bank Cormorant
- Bar-tailed Cuckoo-Dove
- Bar-tailed Godwit
- Bar-throated Apalis
- Bar-winged Flycatcher-shrike
- Bare-eyed Pigeon
- Bare-faced Ibis
- Bare-throated Tiger Heron
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Barred Becard
- Barred Buttonquail
- Barrow's Goldeneye
- Bat Falcon
- Bateleur
- Bay-headed Tanager
- Beach Kingfisher
- Bearded Barbet
- Bearded Reedling
- Bearded Vulture
- Beautiful Jay
- Beautiful Sunbird
- Belted Kingfisher
- Berthelot's Pipit
- Beryl-spangled Tanager
- Bewick's Wren
- Bicolored Hawk
- Bicolored Wren
- Black-and-gold Tanager
- Black-and-white Owl
- Black-and-white Warbler
- Black-and-yellow Tanager
- Black-backed Antshrike
- Black-backed Cisticola
- Black-bellied Bustard
- Black-bellied Firefinch
- Black-bellied Sandgrouse
- Black-bellied Whistling Duck
- Black-billed Nightingale-Thrush
- Black-billed Sicklebill
- Black-billed Thrush
- Black-billed Wood Dove
- Black-browed Albatross
- Black-capped Apalis
- Black-capped Bulbul
- Black-capped Chickadee
- Black-capped Donacobius
- Black-capped Sparrow
- Black-capped Tanager
- Black-capped Tyrannulet
- Black-casqued Hornbill
- Black-cheeked Warbler
- Black-cheeked Woodpecker
- Black-chested Buzzard-Eagle
- Black-chested Jay
- Black-chinned Mountain Tanager
- Black-collared Hawk
- Black-cowled Oriole
- Black-crested Bulbul
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-faced Dacnis
- Black-faced Ibis
- Black-fronted Wood Quail
- Black-headed Canary
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Lapwing
- Black-headed Parrot
- Black-headed Saltator
- Black-headed Siskin
- Black-headed Trogon
- Black-headed Weaver
- Black-hooded Oriole
- Black-hooded Thrush
- Black-legged Kittiwake
- Black-naped Monarch
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Stork
- Black-rumped Waxbill
- Black-striped Sparrow
- Black-tailed Godwit
- Black-tailed Tityra
- Black-tailed Trainbearer
- Black-throated Accentor
- Black-throated Green Warbler
- Black-throated Laughingthrush
- Black-throated Loon
- Black-throated Mango
- Black-winged Ground Dove
- Black-winged Kite
- Black-winged Oriole
- Black-winged Pratincole
- Black-winged Stilt
- Black Bee-eater
- Black Caracara
- Black Catbird
- Black Coucal
- Black Crake
- Black Crowned Crane
- Black Drongo
- Black Fantail
- Black Flowerpiercer
- Black Grouse
- Black Harrier
- Black Hawk-Eagle
- Black Heron
- Black Kite
- Black Lark
- Black Nunbird
- Black Phoebe
- Black Scimitarbill
- Black Scrub Robin
- Black Sicklebill
- Black Sparrowhawk
- Black Stork
- Black Tern
- Black Vulture
- Black Woodpecker
- Blackburnian Warbler
- Blackcap Babbler
- Blackish Nightjar
- Blacksmith Lapwing
- Blossom-headed Parakeet
- Blue-and-black Tanager
- Blue-and-white Mockingbird
- Blue-and-white Swallow
- Blue-bellied Roller
- Blue-billed Malimbe
- Blue-black Grassquit
- Blue-black Kingfisher
- Blue-breasted Kingfisher
- Blue-capped Tanager
- Blue-cheeked Bee-eater
- Blue-footed Booby
- Blue-grey Gnatcatcher
- Blue-grey Tanager
- Blue-headed Coucal
- Blue-headed Parrot
- Blue-mantled Crested Flycatcher
- Blue-moustached Bee-eater
- Blue-naped Chlorophonia
- Blue-naped Mousebird
- Blue-necked Tanager
- Blue-spotted Wood Dove
- Blue-tailed Bee-eater
- Blue-throated Brown Sunbird
- Blue-throated Roller
- Blue-throated Toucanet
- Blue-winged Mountain Tanager
- Blue Crane
- Blue Dacnis
- Blue Grosbeak
- Blue Jay
- Blue Malkoha
- Blue Rock Thrush
- Blue Whistling Thrush
- Bluethroat
- Bluish-grey Saltator
- Blyth's Hornbill
- Blyth's Pipit
- Boat-billed Flycatcher
- Boat-billed Heron
- Boat-tailed Grackle
- Bohemian Waxwing
- Bokmakierie
- Booted Eagle
- Booted Warbler
- Brahminy Kite
- Brambling
- Brant Goose
- Brewer's Blackbird
- Bridled Tern
- Brimstone Canary
- Broad-billed Motmot
- Broad-billed Roller
- Broad-winged Hawk
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzed Cowbird
- Brown-backed Chat-Tyrant
- Brown-capped Babbler
- Brown-capped Vireo
- Brown-chested Martin
- Brown-crested Flycatcher
- Brown-headed Barbet
- Brown-headed Gull
- Brown-hooded Kingfisher
- Brown-hooded Parrot
- Brown-rumped Bunting
- Brown-throated Martin
- Brown-throated Parakeet
- Brown-throated Wattle-eye
- Brown Babbler
- Brown Cuckoo-Dove
- Brown Fish Owl
- Brown Honeyeater
- Brown Illadopsis
- Brown Inca
- Brown Jay
- Brown Oriole
- Brown Pelican
- Brown Skua
- Brown Thrasher
- Brown Violetear
- Brubru
- Bruce's Green Pigeon
- Brush Cuckoo
- Buff-bellied Hummingbird
- Buff-breasted Wren
- Buff-tailed Coronet
- Buff-throated Saltator
- Buff-throated Sunbird
- Bufflehead
- Bulwer's Petrel
- Burrowing Owl
- Bushy-crested Jay