Life (root) » Animalia (Animals) » Chordata (Chordates) » Vertebrata (Vertebrataes) » Reptilia (Reptiles) » Squamata (Squamates) » Serpentes (Snakes) » Viperidae (Vipers) » Crotalinae (Pit Vipers) » Crotalus (Rattlesnakes) » Crotalus atrox (Western Diamondback Rattlesnake)