If you're new to the desert you may be surprised at how many reptiles you don't see. Contrary to popular images, you're not likely to be tripping over snakes and lizards everywhere you go. Unless you're actually hunting them out you probably won't see more than a couple of reptiles in a whole season of warm days. But don't go walking on the desert on a warm summer night without a flashlight. Snakes, including rattlesnakes, do most of their hunting in darkness or semi-light. Both snakes and lizards get most of their water from fluids found in the plants and animals they eat. Not being dependent on free water is a great advantage to them in their arid environment.

Recommended reading:
Brennan, Thomas C. and Andrew T. Holycross. A Field Guide to Amphibians and Reptiles in Arizona. Phoenix: Arizona Game and Fish Department, 2006.

The Arizona Game and Fish Department has published an excellent new guide to all the amphibians and reptiles of the state. See it here. You can order it directly from AGF for $12 by downloading the Publication Order form linked to that page.