Reptiles are cold-blooded, or ectothermic, animals. This means that they cannot produce heat in their own bodies, and have to rely on their surroundings to keep warm. ... By moving in and out of sunlight, reptiles can keep their body temperature at a steady level throughout the day.

Are lizards cold-blooded?

Snakes, lizards, crocodiles, alligators, tortoises, and turtles are all reptiles. Reptiles are cold-blooded, so most of these animals live where it's warm. Cold-blooded animals don't necessarily have cold blood. ... Lizards like to sit around on hot rocks to warm up their blood and speed up their bodies.

What does cold-blooded reptile mean?

“Cold-blooded” means that the animal is unable to automatically control its body temperature. Instead, body temperature is dependent on the temperature of its environment. Another word for “cold-blooded” is ectothermic — invertebrates, fish, amphibians, and reptiles are ectotherms.