A Blacktailed Rattlesnake hiding deep in a cave on an extremely hot day. During the heat of summer, rattlesnakes like this one may stay hidden away from lethal temperatures, staying in one spot or coming just outside the entrance after dark.

A Blacktailed Rattlesnake hiding deep in a cave on an extremely hot day. During the heat of summer, rattlesnakes like this one may stay hidden away from lethal temperatures, staying in one spot or coming just outside the entrance after dark.