Bicolored Wren 
Bicolour parrotfish 
Big Bend slider 
Big Hairy Armadillo 
Big-belly seahorse 
Big-eared Opossum 
Big-nosed chameleon 
Big-scaled Dwarf Gecko 
Bigeye Barracuda 
Bigeye scad 
Bigeye snapper 
Bigeye trevally 
Bighead Carp 
Bighorn sheep 
Bigmouth shiner 
Bignose unicornfish 
Binturong 
Bird wrasse 
Birdbeak burrfish 
Bitis caudalis 
Bitis nasicornis 
Black agouti 
Black and crimson oriole 
Black and rufous elephant shrew