- Baikal Teal
- Bananaquit
- Bar-headed Goose
- Bar-tailed Godwit
- Barn Swallow
- Barnacle Goose
- Barrow's Goldeneye
- Bernier's Teal
- Black-collared Hawk
- Black-collared Starling
- Black-crowned Night Heron
- Black-faced Tanager
- Black-headed Gull
- Black-legged Kittiwake
- Black-naped Fruit Dove
- Black-necked Grebe
- Black-necked Stilt
- Black-necked Swan
- Black-tailed Godwit
- Black-winged Stilt
- Black Crowned Crane
- Black Kite
- Black Redstart
- Black Stork
- Black Swan
- Black Tern
- Black Vulture
- Blacksmith Lapwing
- Blue-and-yellow Macaw
- Blue-billed Teal
- Blue-grey Tanager
- Blue-throated Macaw
- Blue-winged Goose
- Blue-winged Teal
- Blue Crane
- Blyth's Hornbill
- Brahminy Kite
- Brambling
- Brown-chested Martin
- Brown Pelican
- Bush Stone-curlew