- Baird's Flycatcher
- Bananaquit
- Band-rumped Swift
- Band-tailed Antshrike
- Band-tailed Pigeon
- Banded Martin
- Bank Cormorant
- Bar-bellied Woodpecker
- Bar-throated Apalis
- Bar-winged Wood Wren
- Bare-necked Fruitcrow
- Barn Swallow
- Barred Antshrike
- Barred Becard
- Barred Fruiteater
- Bat Falcon
- Bateleur
- Bay-crowned Brushfinch
- Bay-headed Tanager
- Bay Wren
- Bearded Guan
- Bearded Reedling
- Bearded Scrub Robin
- Bearded Tachuri
- Bearded Woodpecker
- Bennett's Woodpecker
- Bicolored Conebill
- Bicolored Hawk
- Black-and-white Hawk-Eagle
- Black-and-white Seedeater
- Black-backed Puffback
- Black-banded Owl
- Black-banded Woodcreeper
- Black-bellied Bustard
- Black-bellied Cuckoo
- Black-bellied Whistling Duck
- Black-billed Seed Finch
- Black-billed Shrike-Tyrant
- Black-browed Albatross
- Black-capped Becard
- Black-capped Donacobius
- Black-capped Hemispingus
- Black-capped Sparrow
- Black-chested Buzzard-Eagle
- Black-chested Prinia
- Black-chested Snake Eagle
- Black-chinned Antbird
- Black-collared Barbet
- Black-collared Hawk
- Black-collared Swallow
- Black-crested Antshrike
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-eared Fairy
- Black-faced Antthrush
- Black-faced Dacnis
- Black-faced Grassquit
- Black-faced Hawk
- Black-faced Tanager
- Black-headed Antbird
- Black-headed Gull
- Black-headed Hemispingus
- Black-headed Heron
- Black-headed Oriole
- Black-headed Parrot
- Black-legged Kittiwake
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Stilt
- Black-spotted Barbet
- Black-streaked Puffbird
- Black-striped Sparrow
- Black-tailed Leaftosser
- Black-tailed Tityra
- Black-tailed Trogon
- Black-throated Antbird
- Black-throated Antshrike
- Black-throated Loon
- Black-throated Mango
- Black-throated Wattle-eye
- Black-whiskered Vireo
- Black-winged Kite
- Black-winged Saltator
- Black-winged Stilt
- Black Caracara
- Black Crake
- Black Cuckooshrike
- Black Curassow
- Black Flowerpiercer
- Black Grouse
- Black Guillemot
- Black Harrier
- Black Hawk-Eagle
- Black Kite
- Black Manakin
- Black Nunbird
- Black Phoebe
- Black Redstart
- Black Skimmer
- Black Sparrowhawk
- Black Vulture
- Blackburnian Warbler
- Blackish-grey Antshrike
- Blackish-headed Spinetail
- Blackish Antbird
- Blackish Nightjar
- Blackish Pewee
- Blackpoll Warbler
- Blacksmith Lapwing
- Blue-and-black Tanager
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-backed Manakin
- Blue-billed Teal
- Blue-black Grassquit
- Blue-black Grosbeak
- Blue-cheeked Amazon
- Blue-chinned Sapphire
- Blue-footed Booby
- Blue-grey Tanager
- Blue-headed Parrot
- Blue-mantled Thornbill
- Blue-necked Tanager
- Blue-tailed Emerald
- Blue-throated Hillstar
- Blue-throated Piping Guan
- Blue-winged Teal
- Blue Crane
- Blue Dacnis
- Blue Ground Dove
- Blue Waxbill
- Bluethroat
- Bluish-grey Saltator
- Boat-billed Flycatcher
- Boat-billed Heron
- Boat-billed Tody-Tyrant
- Bobolink
- Bohemian Waxwing
- Böhm's Spinetail
- Bokmakierie
- Bonelli's Eagle
- Booted Eagle
- Bradfield's Hornbill
- Brambling
- Bran-colored Flycatcher
- Bright-rumped Attila
- Brimstone Canary
- Broad-winged Hawk
- Bronze-olive Pygmy Tyrant
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzy Jacamar
- Brown-backed Chat-Tyrant
- Brown-bellied Stipplethroat
- Brown-chested Martin
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-headed Parrot
- Brown-hooded Kingfisher
- Brown-necked Parrot
- Brown-throated Martin
- Brown-throated Parakeet
- Brown-winged Schiffornis
- Brown Inca
- Brown Jacamar
- Brown Noddy
- Brown Pelican
- Brown Scrub Robin
- Brown Skua
- Brown Snake Eagle
- Brown Trembler
- Brown Violetear
- Brownish Twistwing
- Brubru
- Buff-bellied Tanager
- Buff-breasted Mountain Tanager
- Buff-breasted Wren
- Buff-cheeked Greenlet
- Buff-rumped Warbler
- Buff-throated Saltator
- Buff-throated Woodcreeper
- Burchell's Coucal
- Burchell's Sandgrouse
- Burchell's Starling
- Burnished-buff Tanager
- Burnt-necked Eremomela
- Burrowing Owl