Most reptiles are egg-layers, although some produce live young. In cold regions, reptiles hibernate. In extremely hot or dry climates, some reptiles will estivate, or go into a torpor. Because they lack intenal heating mechanisms, reptiles depend on external heat sources. Thus, you will often find them lying in the sun on rocks and logs.
Most reptiles have a three-chambered heart.
Click on the name of the reptile below to see a picture of its tracks and some natural history information about it. E-mail me and tell me about it. All counters reset in October 2000. Back to the Animal Tracks Den Copyright 1997-2001.