- Baillon's Crake
- Balearic Shearwater
- Balearic Warbler
- Bar-headed Goose
- Bar-tailed Godwit
- Bar-tailed Lark
- Barn Swallow
- Barnacle Goose
- Barrow's Goldeneye
- Bearded Reedling
- Bearded Vulture
- Black-headed Gull
- Black-legged Kittiwake
- Black-necked Grebe
- Black-throated Loon
- Black-winged Kite
- Black-winged Stilt
- Black Grouse
- Black Guillemot
- Black Kite
- Black Stork
- Black Swan
- Black Tern
- Blue-cheeked Bee-eater
- Blue Rock Thrush
- Bluethroat
- Blyth's Pipit
- Blyth's Reed Warbler
- Bohemian Waxwing
- Bonaparte's Gull
- Booted Eagle
- Booted Warbler
- Brambling
- Brant Goose
- Brant Goose (nigricans)
- Brown-necked Raven
- Brown Shrike
- Buff-breasted Sandpiper