Brown-headed Nuthatch 
Brown-necked raven 
Brown-tailed apalis 
Brown-tailed rock chat 
Brown-throated martin 
Brown-throated sunbird 
Brown-throated wattle-eye 
Brownish twistwing 
Brubru 
Bubbling cisticola 
Buff-bellied tanager 
Buff-bellied warbler 
Buff-breasted Babbler 
Buff-breasted earthcreeper 
Buff-breasted mountain tanager 
Buff-breasted wren 
Buff-bridled Inca finch 
Buff-fronted foliage-gleaner 
Buff-rumped warbler 
Buff-sided robin 
Buff-streaked chat 
Buff-throated apalis 
Buff-throated foliage-gleaner 
Buff-throated saltator