- Bald Eagle
- Bare-throated Tiger Heron
- Barn Swallow
- Barred Antshrike
- 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-capped Chickadee
- Black-cheeked Woodpecker
- Black-chested Mountain Tanager
- Black-collared Barbet
- Black-crested Warbler
- 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 Stilt
- Black Guan
- Black Kite
- Black Phoebe
- Black Redstart
- Black Swan
- Black Tern
- Black Vulture
- Blacksmith Lapwing
- Blue-and-yellow Macaw
- Blue-capped Motmot
- Blue-capped Tanager
- Blue-cheeked Bee-eater
- Blue-footed Booby
- Blue Crane
- Blue Jay
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Booted Eagle
- Brant Goose
- Bright-rumped Attila
- Broad-winged Hawk
- Bronze-winged Courser
- Bronze Mannikin
- Bronzed Cowbird
- Brown-hooded Parrot
- Brown Booby
- Brown Jay
- Brown Noddy
- Brown Pelican
- Brown Violetear
- Buff-winged Starfrontlet
- Burchell's Coucal
- Burchell's Starling
- Burnt-necked Eremomela