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 
Bornean spiderhunter 
Bornean treepie 
Brahminy Starling 
Brambling 
Bran-colored flycatcher 
Brauns bushshrike 
Brazilian Tanager 
Brewer's sparrow 
Brewers blackbird 
Bridled honeyeater 
Bright-rumped attila