Buru Babirusa 
Bush dog 
Bush Hyrax 
Bush stone-curlew 
Bush vlei rat 
Bushbuck (Imbabala and Kéwel) 
Bushpig 
Bushy-crested hornbill 
Busuanga Wart Frog 
Butler's Wolf Snake 
Butter Frog 
Butter Hamlet 
Byrne's gecko 
C. megalodon 
Caatinga cacholote 
Caatinga lancehead 
Cabanis's spinetail 
Cabot's tern 
Cachabi robber frog 
Cackling goose 
Cactus canastero 
Cactus wren 
Cadle's Forest Racer 
Caesar grunt