- Baglafecht Weaver
- Baird's Sandpiper
- Baltimore Oriole
- Bananaquit
- Band-tailed Seedeater
- Banded Barbet
- Banded Wren
- Bank Cormorant
- Bank Myna
- Bar-tailed Godwit
- Bar-winged Prinia
- Bare-faced Go-away-bird
- Bare-faced Ground Dove
- Bare-throated Tiger Heron
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Barred Owl
- Bat Falcon
- Bateleur
- Bay-backed Shrike
- Bay Wren
- Baya Weaver
- Bearded Reedling
- Bearded Vulture
- Bearded Woodpecker
- Beautiful Sunbird
- Belcher's Gull
- Bennett's Woodpecker
- Berthelot's Pipit
- Black-and-rufous Warbling Finch
- Black-and-white-casqued Hornbill
- Black-and-white Mannikin
- Black-and-white Warbler
- Black-and-yellow Phainoptila
- Black-backed Puffback
- Black-bellied Bustard
- Black-bellied Whistling Duck
- Black-billed Barbet
- Black-billed Gull
- Black-billed Nightingale-Thrush
- Black-billed Wood Dove
- Black-breasted Puffbird
- Black-browed Albatross
- Black-capped Chickadee
- Black-capped Kingfisher
- Black-cheeked Ant Tanager
- Black-cheeked Warbler
- Black-chinned Siskin
- Black-collared Barbet
- Black-crested Bulbul
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-faced Grassquit
- Black-faced Ibis
- Black-fronted Nunbird
- Black-fronted Tern
- Black-headed Bunting
- Black-headed Duck
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Oriole
- Black-headed Trogon
- Black-headed Weaver
- Black-hooded Antshrike
- Black-hooded Oriole
- Black-hooded Sierra Finch
- Black-legged Kittiwake
- Black-lored Babbler
- Black-naped Tern
- Black-necked Grebe
- Black-necked Stork
- Black-necked Swan
- Black-rumped Flameback
- Black-striped Sparrow
- Black-tailed Godwit
- Black-tailed Trogon
- Black-throated Blue Warbler
- Black-throated Huet-huet
- Black-throated Sunbird
- Black-whiskered Vireo
- Black-winged Ground Dove
- Black-winged Kite
- Black-winged Lovebird
- Black-winged Stilt
- Black Caracara
- Black Crake
- Black Crowned Crane
- Black Cuckooshrike
- Black Drongo
- Black Eagle
- Black Guan
- Black Guillemot
- Black Heron
- Black Hornbill
- Black Kite
- Black Phoebe
- Black Redstart
- Black Skimmer
- Black Swan
- Black Tern
- Black Vulture
- Black Woodpecker
- Blackish Oystercatcher
- Blackpoll Warbler
- Blacksmith Lapwing
- Blackstart
- Blanford's Lark (erlangeri)
- Blue-and-white Swallow
- Blue-and-yellow Tanager
- Blue-bellied Roller
- Blue-billed Teal
- Blue-black Grassquit
- Blue-breasted Kingfisher
- Blue-cheeked Bee-eater
- Blue-chested Hummingbird
- Blue-footed Booby
- Blue-grey Gnatcatcher
- Blue-grey Tanager
- Blue-headed Bee-eater
- Blue-headed Hummingbird
- Blue-headed Vireo
- Blue-naped Mousebird
- Blue-tailed Bee-eater
- Blue-throated Bee-eater
- Blue-winged Goose
- Blue Crane
- Blue Dacnis
- Blue Grosbeak
- Blue Jay
- Blue Nuthatch
- Blue Rock Thrush
- Blue Waxbill
- Blue Whistling Thrush
- Bluethroat
- Boat-billed Flycatcher
- Bohemian Waxwing
- Bokmakierie
- Bonaparte's Gull
- Booted Eagle
- Bradfield's Hornbill
- Brahminy Kite
- Brahminy Starling
- Brandt's Mountain Finch
- Brant Goose
- Brewer's Blackbird
- Bridled Quail-Dove
- Bridled Tern
- Bright-rumped Attila
- Brimstone Canary
- Bristle-crowned Starling
- Broad-billed Roller
- Broad-winged Hawk
- Bronze-winged Duck
- Bronze-winged Jacana
- Bronzy Sunbird
- Brown-chested Alethe
- Brown-chested Martin
- Brown-crowned Tchagra
- Brown-headed Barbet
- Brown-hooded Gull
- Brown-rumped Seedeater
- Brown-throated Martin
- Brown Booby
- Brown Fish Owl
- Brown Jay
- Brown Noddy
- Brown Parisoma
- Brown Pelican
- Brown Prinia
- Brown Rock Chat
- Brown Shrike
- Brown Trembler
- Bruce's Green Pigeon
- Buff-bellied Pipit
- Buff-rumped Warbler
- Buff-throated Saltator
- Burchell's Starling
- Burrowing Parrot