Blue-winged Leafbird 
Blue-winged Minla 
Blue-winged mountain tanager 
Blue-winged Pitta 
Blue-winged warbler 
Bluethroat 
Bluish flowerpiercer 
Bluish-gray Saltator 
Bluish-slate antshrike 
Blyths paradise flycatcher 
Boat-billed flycatcher 
Boat-tailed Grackle 
Bobolink 
Bocage's sunbird 
Bocages akalat 
Bohemian Waxwing 
Bold-striped tit-babbler 
Bolivian tapaculo 
Bolivian Tyrannulet 
Boran cisticola 
Bornean bristlehead 
Bornean bulbul 
Bornean green magpie 
Bornean leafbird