- Bananaquit
- Band-rumped Swift
- Band-tailed Antshrike
- Bare-necked Fruitcrow
- Barn Swallow
- Barred Antshrike
- Bat Falcon
- Bateleur
- Bay-headed Tanager
- Bearded Reedling
- Bearded Tachuri
- Bearded Woodpecker
- Bennett's Woodpecker
- Bicolored Conebill
- Bicolored Hawk
- Black-and-white Hawk-Eagle
- Black-banded Owl
- Black-banded Woodcreeper
- Black-bellied Cuckoo
- Black-bellied Whistling Duck
- Black-capped Becard
- Black-capped Donacobius
- Black-chested Prinia
- Black-chested Snake Eagle
- Black-chinned Antbird
- Black-collared Hawk
- Black-collared Swallow
- Black-crested Antshrike
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-eared Fairy
- Black-faced Antthrush
- Black-faced Dacnis
- Black-faced Hawk
- Black-faced Tanager
- Black-headed Antbird
- Black-headed Gull
- Black-headed Parrot
- Black-legged Kittiwake
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Stilt
- Black-spotted Barbet
- Black-tailed Leaftosser
- Black-tailed Tityra
- Black-tailed Trogon
- Black-throated Antbird
- Black-throated Antshrike
- Black-throated Loon
- Black-throated Mango
- Black-throated Trogon
- Black-winged Kite
- Black-winged Stilt
- Black Curassow
- Black Grouse
- Black Guillemot
- Black Hawk-Eagle
- Black Kite
- Black Manakin
- Black Nunbird
- Black Redstart
- Black Skimmer
- Black Vulture
- Blackburnian Warbler
- Blackish Antbird
- Blackish Nightjar
- Blackpoll Warbler
- Blacksmith Lapwing
- Blue-and-yellow Macaw
- Blue-backed Manakin
- Blue-black Grassquit
- Blue-black Grosbeak
- Blue-chinned Sapphire
- Blue-grey Tanager
- Blue-headed Parrot
- Blue-tailed Emerald
- Blue-winged Teal
- Blue Dacnis
- Blue Waxbill
- Bluethroat
- Boat-billed Flycatcher
- Boat-billed Heron
- Bobolink
- Bohemian Waxwing
- Bonelli's Eagle
- Booted Eagle
- Bradfield's Hornbill
- Brambling
- Bran-colored Flycatcher
- Bright-rumped Attila
- Broad-winged Hawk
- Bronzy Jacamar
- Brown-bellied Antwren
- Brown-chested Martin
- Brown-crested Flycatcher
- Brown-throated Parakeet
- Brown-winged Schiffornis
- Brown Noddy
- Brubru
- Buff-breasted Wren
- Buff-throated Foliage-gleaner
- Buff-throated Saltator
- Buff-throated Woodcreeper
- Burchell's Sandgrouse
- Burchell's Starling
- Burnished-buff Tanager
- Burrowing Owl