western diamondback rattlesnake

animal animals atrox back backs brown coil coiled crotalinae crotalus dangerous diamond diamondback diamondbacks elliptical eye grass gray ground head life living markings natural nature nostril outdoor outdoors pit poisonous pupils rattler rattlers rattlesnake rattlesnakes reptile reptiles rocks scales serpent serpents snake snakes tan triangular venomous viper viperidae vipers weeds white