- Baglafecht Weaver
- Band-tailed Manakin
- Bank Myna
- Bar-headed Goose
- Barn Swallow
- Barred Antshrike
- Bat Falcon
- Bearded Barbet
- Black-capped Becard
- Black-casqued Hornbill
- Black-cheeked Lovebird
- Black-fronted Nunbird
- Black-headed Gull
- Black-headed Heron
- Black-headed Trogon
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Swan
- Black-tailed Godwit
- Black-tailed Tityra
- Black-throated Wattle-eye
- Black-winged Stilt
- Black Bulbul
- Black Kite
- Blue-and-yellow Macaw
- Blue-cheeked Amazon
- Blue-crowned Laughingthrush
- Blue-crowned Lorikeet
- Blue-crowned Trogon
- Blue-footed Booby
- Blue-headed Macaw
- Blue-throated Barbet
- Blue Coua
- Blue Manakin
- Blue Vanga
- Bluish-fronted Jacamar
- Brazilian Tanager
- Brolga
- Brown-mandibled Aracari
- Brown Eared Pheasant
- Brown Noddy
- Brown Pelican
- Brown Snake Eagle
- Buff-throated Woodcreeper
- Bulwer's Pheasant
- Burrowing Parrot