Reptiles

Reptiles are a group of animals with dry, scaly skin. They are cold-blooded, so they need the sun to warm up. Most reptiles lay eggs with tough, leathery shells. Snakes, lizards, turtles, and crocodiles are all reptiles.

Cold-Blooded Bodies

Reptiles cannot make their own body heat like mammals can. They bask in the sun to warm up and move to shade to cool down. This is why you often see lizards sitting on warm rocks. In cold weather, reptiles become slow and sluggish.

Types of Reptiles

There are four main groups of reptiles. Lizards and snakes make up the biggest group. Turtles and tortoises have protective shells. Crocodilians include crocodiles, alligators, and caimans. The tuatara is the only living member of its ancient group.

Fun Facts

• Some reptiles, like crocodiles, have been around since the time of the dinosaurs.
• Snakes smell with their tongues by flicking them in and out.
• A sea turtle can hold its breath for up to 7 hours while sleeping underwater.

Did You Know?

Reptiles shed their skin as they grow. Snakes shed their entire skin in one piece, while lizards shed theirs in patches!