Western diamondback rattlesnake 
Western dwarf gecko 
Western fence lizard 
Western Ghats bronzeback 
Western Green Lizard 
Western green mamba 
Western Ground Snake 
Western hognose snake 
Western kukri 
Western leaf lizard 
Western rat snake 
Western shovelnose snake 
Western Skink 
Western slender blind snake 
Western terrestrial garter snake 
Western Whiptail 
Whistling Lizard 
Whitaker's boa 
White's Skink 
White-banded Tree Snake 
White-bellied Rat Snake 
White-fronted water snake 
White-headed Dwarf Gecko 
White-lipped Island Pitviper