sidewinder rattlesnake (crotalus cerastes)

animal arid bite blooded bush carnivore cerastes closeup cold creature crotalus danger deadly death desert dry eyes heat herpetology hiking horizontal horned horns las lethal life living mohave mojave national park parks phobia pit poison poisonous predator rattle rattler rattlesnake reptile sand scales scary sidewinder snake strike sun sunning thermal toxic valley vegas venom venomous viper wild wildlife xeric