- Baglafecht Weaver
- Baird's Sandpiper
- Balearic Shearwater
- Baltimore Oriole
- Bananaquit
- Band-tailed Pigeon
- Bar-headed Goose
- Bar-shouldered Dove
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Barred Antshrike
- Barred Forest Falcon
- Bat Falcon
- Bateleur
- Bearded Vulture
- Bearded Woodpecker
- Beautiful Sunbird
- Belted Kingfisher
- Beryl-spangled Tanager
- Black-and-white Warbler
- Black-backed Puffback
- Black-bellied Bustard
- Black-billed Barbet
- Black-billed Shrike-Tyrant
- Black-capped Tanager
- Black-cheeked Woodpecker
- Black-chested Mountain Tanager
- Black-chested Snake Eagle
- Black-chinned Mountain Tanager
- Black-cowled Oriole
- Black-crowned Night Heron
- Black-crowned Tityra
- Black-faced Cormorant
- Black-faced Cuckooshrike
- Black-faced Sandgrouse
- Black-headed Gull
- Black-headed Heron
- Black-headed Honeyeater
- Black-headed Oriole
- Black-headed Saltator
- Black-headed Trogon
- Black-lored Babbler
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Swan
- Black-shouldered Kite
- Black-striped Sparrow
- Black-striped Woodcreeper
- Black-tailed Godwit
- Black-tailed Trainbearer
- Black-throated Green Warbler
- Black-winged Kite
- Black-winged Lovebird
- Black-winged Saltator
- Black-winged Stilt
- Black Catbird
- Black Crake
- Black Flowerpiercer
- Black Heron
- Black Kite
- Black Phoebe
- Black Redstart
- Black Scimitarbill
- Black Skimmer
- Black Solitaire
- Black Stork
- Black Swan
- Black Vulture
- Black Woodpecker
- Blacksmith Lapwing
- Blanford's Lark (erlangeri)
- Blue-and-white Swallow
- Blue-and-yellow Macaw
- Blue-billed Duck
- Blue-billed Teal
- Blue-black Grassquit
- Blue-capped Cordon-bleu
- Blue-cheeked Bee-eater
- Blue-faced Honeyeater
- Blue-grey Tanager
- Blue-naped Mousebird
- Blue-necked Tanager
- Blue-winged Goose
- Blue-winged Mountain Tanager
- Blue-winged Teal
- Bluethroat
- Blyth's Leaf Warbler
- Boat-billed Flycatcher
- Boat-billed Heron
- Brahminy Kite
- Brambling
- Brant Goose
- Bright-rumped Attila
- Bristle-crowned Starling
- Brolga
- Bronze-winged Parrot
- Bronze Mannikin
- Bronzed Cowbird
- Brown-backed Woodpecker
- Brown-capped Vireo
- Brown-chested Alethe
- Brown-crested Flycatcher
- Brown-rumped Seedeater
- Brown-throated Martin
- Brown-throated Wattle-eye
- Brown Falcon
- Brown Gerygone
- Brown Honeyeater
- Brown Inca
- Brown Jay
- Brown Noddy
- Brown Pelican
- Brown Snake Eagle
- Brown Thornbill
- Brown Violetear
- Brubru
- Buff-bellied Hummingbird
- Buff-bellied Warbler
- Buff-crested Bustard
- Buff-rumped Warbler
- Buff-tailed Coronet
- Buff-throated Saltator
- Buff-winged Starfrontlet