- Baglafecht Weaver
- Bald Eagle
- Bananaquit
- Bar-winged Flycatcher-shrike
- Bare-faced Go-away-bird
- Bare-faced Ibis
- Bare-throated Tiger Heron
- Barn Swallow
- Barred Antshrike
- Barred Fruiteater
- Barred Puffbird
- Barred Warbler
- Bat Falcon
- Bateleur
- Bay-backed Shrike
- Bay-headed Tanager
- Bay Wren
- Baya Weaver
- Bearded Barbet
- Bearded Scrub Robin
- Bearded Woodpecker
- Belted Kingfisher
- Bicolored Antbird
- Bicolored Antpitta
- Bicolored Antvireo
- Black-bellied Bustard
- Black-bellied Whistling Duck
- Black-bellied Wren
- Black-billed Thrush
- Black-breasted Puffbird
- Black-capped Chickadee
- Black-capped Donacobius
- Black-chested Jay
- Black-chested Snake Eagle
- Black-chinned Mountain Tanager
- Black-collared Hawk
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-faced Antthrush
- Black-faced Sandgrouse
- Black-fronted Nunbird
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Tody-Flycatcher
- Black-hooded Oriole
- Black-rumped Flameback
- Black-striped Woodcreeper
- Black-tailed Godwit
- Black-tailed Myiobius
- Black-tailed Trogon
- Black-throated Loon
- Black-throated Mango
- Black-winged Cuckooshrike
- Black-winged Kite
- Black-winged Lapwing
- Black-winged Saltator
- Black-winged Stilt
- Black Antshrike
- Black Bittern
- Black Bulbul
- Black Coucal
- Black Drongo
- Black Kite
- Black Phoebe
- Black Redstart
- Black Stork
- Black Vulture
- Black Woodpecker
- Blacksmith Lapwing
- Blond-crested Woodpecker
- Blue-and-yellow Macaw
- Blue-bearded Bee-eater
- Blue-bellied Roller
- Blue-billed Teal
- Blue-black Grassquit
- Blue-capped Manakin
- Blue-capped Motmot
- Blue-chested Hummingbird
- Blue-crowned Trogon
- Blue-faced Malkoha
- Blue-grey Tanager
- Blue-throated Barbet
- Blue-throated Toucanet
- Blue-winged Mountain Tanager
- Blue-winged Teal
- Blue Cotinga
- Blue Coua
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Bluish-fronted Jacamar
- Bluish-grey Saltator
- Blyth's Pipit
- Blyth's Reed Warbler
- Boat-billed Heron
- Bohemian Waxwing
- Bonaparte's Gull
- Booted Warbler
- Boreal Owl
- Bradfield's Hornbill
- Brahminy Starling
- Brambling
- Brewer's Blackbird
- Broad-billed Motmot
- Broad-billed Roller
- Broad-winged Hawk
- Bronze-tailed Plumeleteer
- Bronze-winged Jacana
- Bronze Mannikin
- Bronzed Cowbird
- Brown-chested Martin
- Brown-crowned Tchagra
- Brown-headed Barbet
- Brown-hooded Kingfisher
- Brown Fish Owl
- Brown Pelican
- Brown Snake Eagle
- Brown Violetear
- Buff-barred Warbler
- Buff-breasted Wren
- Buff-crested Bustard
- Buff-necked Ibis
- Buff-rumped Warbler
- Buff-tailed Coronet
- Buff-throated Saltator
- Burnished-buff Tanager
- Burrowing Owl