When the average person thinks of a reptile, he thinks of a snake. But actually, this class of animals includes many other creeping and crawling creatures.

In the animal kingdom, reptiles rank between the amphibians and the birds. Amphibians are animals that can live both on land and in the water. As a matter of fact, scientists believe that birds developed from the reptiles several million years ago. At that time, the reptiles were the the ruling class among animals, and they were often of giant size. But these giant reptiles died out, and the reptiles that are living today are comparatively small. The largest of these are crocodiles and the python snakes.