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. Here the diverse nature of the various reptile groups is fully detailed followed by a look at a great variety of snakes from around the world, distinguishing those that are poisonous from the many that are not.