The main types of reptiles are:

• SNAKES; cobras, rattlesnakes and boa constrictors are some dangerous snakes.
  
• LIZARDS; like the Gila Monster and the iguana. Lizards mainly have the following features: four legs, movable eyelids, scales along the sides and underside of the body and a long detachable tail.
• TURTLES; like the Giant Turtle and Box Turtle.
  
• CROCODILIANS; like crocodiles & alligators.

There are about 2500 species of snakes, 2500 of lizards, nearly 250 of turtles, and 21 species of crocodilians. Reptiles live mainly in the temperate and tropical regions of the world, where it is always warm. Reptiles are cold-blooded (dependent on the environment for warmth), so they cannot live in colder regions. The majority of reptiles lay eggs but many snakes and lizards give birth to living young. Larger reptiles, such as crocodiles, eat large mammals by crushing, twisting and drowning their prey. The saltwalter crocodile can be 30 feet long.