100 illustrations. This volume is a fast-moving introduction to these intriguing, resourceful, often misunderstood creatures. Because most reptiles are predators, they have well-developed senses to aid them in finding prey and avoiding danger. Furthermore, as cold-blooded animals, they must rely on the ambient temperature to maintain body heat. Apart from this, there are considerable differences in physical characteristics and adaptation to habitat. Here the diverse nature of the various reptile groups is fully detailed followed by a look at a great variety of snakes - including anacondas, boas, pythons, cobras, and rattlesnakes - as well as other reptiles such as lizards, iguanas, geckoes, chameleons, turtles, alligators, and crodiles. This book contains 100 full-color photographs.