Bedriaga's Wonder Gecko 
Bedriagas rock lizard 
Bell's Angle-headed Dragon 
Bell's Dabb Lizard 
Bengal monitor (Indian monitor) 
Bernier's Striped Snake 
Betroka Leaf-toed Gecko 
Big Bend slider 
Big-nosed chameleon 
Big-scaled Dwarf Gecko 
Bitis caudalis 
Bitis nasicornis 
Black caiman 
Black copper rat snake 
Black forest racer 
Black girdled lizard 
Black Halloween Snake 
Black mamba 
Black river turtle 
Black roughneck monitor lizard 
Black Spiny-tailed Iguana 
Black striped snake 
Black tree monitor 
Black Whip Snake