- Baglafecht Weaver
- Baillon's Crake
- Bald Eagle
- Balearic Shearwater
- Bananaquit
- Band-tailed Seedeater
- Banded Prinia
- Bar-headed Goose
- Bar-shouldered Dove
- Bar-tailed Godwit
- Bar-tailed Lark
- Bar-tailed Trogon
- Bar-winged Flycatcher-shrike
- Bare-cheeked Babbler
- Bare-faced Curassow
- Bare-faced Go-away-bird
- Bare-faced Ground Dove
- Bare-faced Ibis
- Bare-throated Tiger Heron
- Barn Swallow
- Barnacle Goose
- Barred Buttonquail
- Barred Warbler
- Bat Hawk
- Bateleur
- Baya Weaver
- Bearded Scrub Robin
- Bearded Vulture
- Bearded Woodpecker
- Beaudouin's Snake Eagle
- Beautiful Sunbird
- Belcher's Gull
- Bell's Vireo
- Belted Kingfisher
- Bernier's Teal
- Bewick's Wren
- Black-and-red Broadbill
- Black-and-white-casqued Hornbill
- Black-and-white Mannikin
- Black-and-white Shrike-flycatcher
- Black-backed Grosbeak
- Black-backed Puffback
- Black-backed Water Tyrant
- Black-banded Woodcreeper
- Black-bellied Bustard
- Black-bellied Sandgrouse
- Black-billed Barbet
- Black-billed Magpie
- Black-billed Turaco
- Black-billed Weaver
- Black-browed Albatross
- Black-browed Bushtit
- Black-capped Bulbul
- Black-capped Chickadee
- Black-capped Donacobius
- Black-capped Social Weaver
- Black-chested Buzzard-Eagle
- Black-chested Prinia
- Black-chested Snake Eagle
- Black-collared Barbet
- Black-collared Hawk
- Black-crowned Night Heron
- Black-crowned Sparrow-Lark
- Black-crowned Tchagra
- Black-crowned Waxbill
- Black-eared Catbird
- Black-faced Cormorant
- Black-faced Cuckooshrike
- Black-faced Ibis
- Black-faced Rufous Warbler
- Black-faced Sandgrouse
- Black-faced Waxbill
- Black-fronted Nunbird
- Black-goggled Tanager
- Black-headed Gonolek
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Lapwing
- Black-headed Oriole
- Black-headed Weaver
- Black-hooded Oriole
- Black-hooded Sierra Finch
- Black-legged Kittiwake
- Black-naped Monarch
- Black-necked Crane
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Stork
- Black-necked Swan
- Black-necked Weaver
- Black-rumped Flameback
- Black-shouldered Kite
- Black-tailed Godwit
- Black-throated Barbet
- Black-throated Bushtit
- Black-throated Canary
- Black-throated Munia
- Black-throated Saltator
- Black-winged Ground Dove
- Black-winged Kite
- Black-winged Lapwing
- Black-winged Lovebird
- Black-winged Red Bishop
- Black-winged Snowfinch
- Black-winged Stilt
- Black Bee-eater
- Black Coucal
- Black Crake
- Black Crowned Crane
- Black Currawong
- Black Drongo
- Black Eagle
- Black Grouse
- Black Guillemot
- Black Heron
- Black Hornbill
- Black Kite
- Black Oystercatcher
- Black Phoebe
- Black Redstart
- Black Scrub Robin
- Black Skimmer
- Black Stork
- Black Swan
- Black Turnstone
- Black Vulture
- Blackish Oystercatcher
- Blackish Rail
- Blacksmith Lapwing
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-bellied Roller
- Blue-billed Black Tyrant
- Blue-billed Teal
- Blue-breasted Bee-eater
- Blue-breasted Kingfisher
- Blue-capped Cordon-bleu
- Blue-cheeked Bee-eater
- Blue-crowned Parakeet
- Blue-crowned Trogon
- Blue-faced Honeyeater
- Blue-faced Malkoha
- Blue-footed Booby
- Blue-headed Bee-eater
- Blue-headed Coucal
- Blue-moustached Bee-eater
- Blue-naped Mousebird
- Blue-shouldered Robin-Chat
- Blue-spotted Wood Dove
- Blue-tailed Bee-eater
- Blue-throated Macaw
- Blue-throated Piping Guan
- Blue-throated Roller
- Blue-winged Goose
- Blue-winged Teal
- Blue Coua
- Blue Crane
- Blue Finch
- Blue Jay
- Blue Malkoha
- Blue Manakin
- Blue Rock Thrush
- Blue Waxbill
- Bluethroat
- Blyth's Pipit
- Boat-billed Heron
- Boat-tailed Grackle
- Bocage's Bushshrike
- Bohemian Waxwing
- Böhm's Bee-eater
- Bokmakierie
- Bolivian Slaty Antshrike
- Bonelli's Eagle
- Booted Eagle
- Boreal Chickadee
- Brahminy Kite
- Brahminy Starling
- Brambling
- Bran-colored Flycatcher
- Brandt's Cormorant
- Brazilian Teal
- Brewer's Blackbird
- Bridled Honeyeater
- Bright-rumped Yellow Finch
- Brimstone Canary
- Broad-billed Roller
- Broad-tailed Hummingbird
- Brolga
- Bronze-tailed Starling
- Bronze-winged Courser
- Bronze-winged Jacana
- Bronze Mannikin
- Bronze Sunbird
- Brown-breasted Bulbul
- Brown-capped Babbler
- Brown-capped Weaver
- Brown-chested Alethe
- Brown-chested Martin
- Brown-crested Flycatcher
- Brown-crowned Tchagra
- Brown-headed Barbet
- Brown-headed Cowbird
- Brown-headed Parrot
- Brown-hooded Gull
- Brown-hooded Kingfisher
- Brown-necked Raven
- Brown-rumped Bunting
- Brown-throated Wattle-eye
- Brown Accentor
- Brown Babbler
- Brown Boobook
- Brown Creeper
- Brown Cuckoo-Dove
- Brown Dipper
- Brown Falcon
- Brown Firefinch
- Brown Fish Owl
- Brown Pelican
- Brown Skua
- Brown Snake Eagle
- Brown Wood Owl
- Brubru
- Buff-breasted Earthcreeper
- Buff-crested Bustard
- Buff-necked Ibis
- Bufflehead
- Buffy Pipit
- Burchell's Coucal
- Burchell's Courser
- Burchell's Sandgrouse
- Burchell's Starling
- Burnished-buff Tanager
- Burnt-necked Eremomela
- Burrowing Owl
- Bush Stone-curlew