A Southwestern Speckled Rattlesnake hiding away on a dry May day. A site nearby will serve as an aestivation den a few weeks later, once temperatures were firmly in the triple digits each day.

A Southwestern Speckled Rattlesnake hiding away on a dry May day. A site nearby will serve as an aestivation den a few weeks later, once temperatures were firmly in the triple digits each day.
Western Diamondback Rattlesnakes getting some sun just outside their winter den several springs ago in central Arizona.
Arizona Black Rattlesnake watching us as we watch her from a basking spot near her winter den. She is one of a group of females that will stay here all year, eventually giving birth late in the summer.
A Western Diamondback Rattlesnake out basking in early Spring at its den. An hour later, this animal was out on the crawl looking for females to court, and make sure rival males stick to their own rocks.