- Bald Eagle
- Bananaquit
- Bar-crested Antshrike
- Bare-faced Ibis
- Bare-throated Tiger Heron
- Barn Swallow
- Barred Antshrike
- Barred Fruiteater
- Bay-headed Tanager
- Bearded Vulture
- Bearded Woodpecker
- Beryl-spangled Tanager
- Black-and-chestnut Eagle
- Black-backed Puffback
- Black-bellied Bustard
- Black-bellied Whistling Duck
- Black-billed Mountain Toucan
- Black-billed Thrush
- Black-capped Chickadee
- Black-capped Tanager
- Black-cheeked Woodpecker
- Black-chested Buzzard-Eagle
- Black-chested Jay
- Black-chested Mountain Tanager
- Black-chested Snake Eagle
- Black-chinned Mountain Tanager
- Black-collared Barbet
- Black-crested Warbler
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-faced Cormorant
- Black-faced Ibis
- Black-headed Grosbeak
- Black-headed Gull
- Black-headed Heron
- Black-headed Oriole
- Black-headed Trogon
- Black-hooded Antshrike
- Black-necked Grebe
- Black-necked Stilt
- Black-striped Sparrow
- Black-tailed Godwit
- Black-winged Kite
- Black-winged Saltator
- Black-winged Stilt
- Black Flowerpiercer
- Black Guan
- Black Kite
- Black Phoebe
- Black Redstart
- Black Swan
- Black Tern
- Black Vulture
- Blackburnian Warbler
- Blacksmith Lapwing
- Blue-and-black Tanager
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-backed Conebill
- Blue-black Grassquit
- Blue-capped Motmot
- Blue-capped Tanager
- Blue-cheeked Bee-eater
- Blue-footed Booby
- Blue-grey Tanager
- Blue-headed Parrot
- Blue-necked Tanager
- Blue-winged Mountain Tanager
- Blue Crane
- Blue Jay
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Booted Eagle
- Brant Goose
- Bright-rumped Attila
- Broad-winged Hawk
- Bronze-winged Courser
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzed Cowbird
- Bronzy Inca
- Brown-banded Antpitta
- Brown-hooded Parrot
- Brown Booby
- Brown Jay
- Brown Noddy
- Brown Pelican
- Brown Violetear
- Buff-tailed Coronet
- Buff-winged Starfrontlet
- Buffy Helmetcrest
- Burchell's Coucal
- Burchell's Starling
- Burnt-necked Eremomela