- Baglafecht Weaver
- Baikal Teal
- Baillon's Crake
- Balearic Warbler
- Baltimore Oriole
- Bananaquit
- Band-backed Wren
- Band-tailed Pigeon
- Banded Barbet
- Banded Bay Cuckoo
- Bank Myna
- Bar-backed Partridge
- Bar-breasted Firefinch
- Bar-crested Antshrike
- Bar-headed Goose
- Bar-tailed Godwit
- Barbary Partridge
- Bare-faced Go-away-bird
- Bare-faced Ibis
- Barn Swallow
- Barred Antshrike
- Barred Warbler
- Bat Falcon
- Bateleur
- Bay-backed Shrike
- Bay-headed Tanager
- Bay Wren
- Bearded Barbet
- Bearded Reedling
- Bearded Vulture
- Bearded Woodpecker
- Beaudouin's Snake Eagle
- Beautiful Sunbird
- Belted Kingfisher
- Berthelot's Pipit
- Besra
- Bewick's Wren
- Bicolored Antpitta
- Bicolored Conebill
- Black-and-red Broadbill
- Black-and-white Mannikin
- Black-and-white Shrike-flycatcher
- Black-and-white Warbler
- Black-bellied Bustard
- Black-bellied Sandgrouse
- Black-bellied Tern
- Black-billed Barbet
- Black-billed Thrush
- Black-billed Wood Dove
- Black-billed Wood Hoopoe
- Black-capped Chickadee
- Black-capped Donacobius
- Black-capped Hemispingus
- Black-capped Tanager
- Black-chested Snake Eagle
- Black-collared Hawk
- Black-crested Bulbul
- Black-crested Coquette
- Black-crested Warbler
- Black-crowned Antshrike
- Black-crowned Night Heron
- Black-crowned Sparrow-Lark
- Black-crowned Tanager
- Black-crowned Tchagra
- Black-crowned Tityra
- Black-eared Fairy
- Black-faced Bunting
- Black-faced Grassquit
- Black-faced Sandgrouse
- Black-faced Tanager
- Black-headed Bulbul
- Black-headed Bunting
- Black-headed Gull
- Black-headed Heron
- Black-headed Ibis
- Black-headed Lapwing
- Black-headed Oriole
- Black-headed Weaver
- Black-hooded Oriole
- Black-legged Kittiwake
- Black-lored Babbler
- Black-naped Monarch
- Black-naped Oriole
- Black-necked Aracari
- Black-necked Grebe
- Black-necked Weaver
- Black-rumped Flameback
- Black-rumped Waxbill
- Black-tailed Godwit
- Black-tailed Tityra
- Black-thighed Falconet
- Black-thighed Puffleg
- Black-throated Accentor
- Black-throated Blue Warbler
- Black-throated Loon
- Black-throated Mango
- Black-winged Cuckooshrike
- Black-winged Kite
- Black-winged Lapwing
- Black-winged Lovebird
- Black-winged Pratincole
- Black-winged Red Bishop
- Black-winged Saltator
- Black-winged Stilt
- Black Bee-eater
- Black Bishop
- Black Bittern
- Black Crake
- Black Drongo
- Black Dwarf Hornbill
- Black Eagle
- Black Francolin
- Black Grouse
- Black Guillemot
- Black Heron
- Black Kite
- Black Kite (lineatus)
- Black Lark
- Black Oystercatcher
- Black Phoebe
- Black Redstart
- Black Saw-wing
- Black Skimmer
- Black Stork
- Black Tern
- Black Turnstone
- Black Vulture
- Black Wheatear
- Black Woodpecker
- Blackburnian Warbler
- Blackcap Babbler
- Blackish Nightjar
- Blacksmith Lapwing
- Blackstart
- Blue-and-white Swallow
- Blue-bearded Bee-eater
- Blue-bellied Roller
- Blue-billed Malimbe
- Blue-billed Teal
- Blue-black Grassquit
- Blue-black Grosbeak
- Blue-breasted Kingfisher
- Blue-capped Cordon-bleu
- Blue-capped Redstart
- Blue-capped Tanager
- Blue-cheeked Bee-eater
- Blue-eared Barbet
- Blue-grey Tanager
- Blue-headed Coucal
- Blue-headed Wood Dove
- Blue-necked Tanager
- Blue-spotted Wood Dove
- Blue-tailed Bee-eater
- Blue-tailed Emerald
- Blue-throated Barbet
- Blue-throated Brown Sunbird
- Blue-throated Roller
- Blue-winged Goose
- Blue-winged Leafbird
- Blue-winged Mountain Tanager
- Blue-winged Teal
- Blue Coua
- Blue Dacnis
- Blue Jay
- Blue Rock Thrush
- Blue Whistling Thrush
- Bluethroat
- Bluish-grey Saltator
- Blyth's Pipit
- Blyth's Reed Warbler
- Boat-billed Flycatcher
- Boat-billed Heron
- Bobolink
- Bohemian Waxwing
- Bolle's Pigeon
- Bonaparte's Gull
- Bonelli's Eagle
- Booted Eagle
- Booted Warbler
- Boreal Owl
- Brahminy Kite
- Brahminy Starling
- Brambling
- Brandt's Cormorant
- Brant Goose
- Brewer's Blackbird
- Bridled Tern
- Brimstone Canary
- Bristle-nosed Barbet
- Broad-billed Roller
- Broad-billed Sandpiper
- Broad-winged Hawk
- Bronze-tailed Starling
- Bronze-winged Jacana
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzy Inca
- Brown-backed Chat-Tyrant
- Brown-backed Needletail
- Brown-banded Antpitta
- Brown-breasted Barbet
- Brown-cheeked Fulvetta
- Brown-crested Flycatcher
- Brown-headed Barbet
- Brown-headed Cowbird
- Brown-headed Gull
- Brown-necked Raven
- Brown-rumped Seedeater
- Brown-throated Martin
- Brown-throated Parakeet
- Brown-throated Sunbird
- Brown-throated Wattle-eye
- Brown Accentor
- Brown Babbler
- Brown Booby
- Brown Dipper
- Brown Fish Owl
- Brown Mesite
- Brown Noddy
- Brown Pelican
- Brown Rock Chat
- Brown Shrike
- Brown Snake Eagle
- Brown Thrasher
- Brown Trembler
- Brown Violetear
- Brubru
- Bruce's Green Pigeon
- Buff-bellied Warbler
- Buff-breasted Sandpiper
- Buff-crested Bustard
- Buff-rumped Warbler
- Buff-tailed Coronet
- Buff-throated Saltator
- Buff-throated Sunbird
- Buff-vented Bulbul
- Buffy Helmetcrest