- Baird's Sandpiper
- Bananaquit
- Band-tailed Seedeater
- Bare-faced Ibis
- Black-chested Buzzard-Eagle
- Black-chinned Siskin
- Black-crowned Night Heron
- Black-faced Ibis
- Black-hooded Sierra Finch
- Black-necked Swan
- Black Jacobin
- Black Siskin
- Black Skimmer
- Black Vulture
- Blackish Oystercatcher
- Blue-and-white Swallow
- Blue-and-yellow Tanager
- Brazilian Teal
- Bronze-winged Duck
- Buff-necked Ibis
- Burrowing Owl