(not mammals)CLASS REPTILIA

Body temperature:-Reptiles use sun and shade to keep their

body temperature regular. If they get to cold they will become tired. Skin:

-Reptiles have dry, scaly skin. Their tough skin protects them against injury and prevents moisture from getting in. Reptiles are covered in keratin, an oil that makes hair and horns grow, but they don’t have any hair.

KEY CHARACTERISTICS

Heart:-Reptiles have a four-chambered heart. This further

separates reptiles from amphibians.

Reproduction:-Most reptiles lay eggs that have a thick, leathery skin.

The female lays the nest and leaves.

Food:-Since reptiles don't use internal energy to keep their

body warm, they don't need nearly as much food as mammals. Most reptiles are carnivores, and eat small insects or other animals.

KEY CHARACTERISTICS

Most reptiles leave their nests after laying eggs, but some snakes stay around the area that they laid eggs.

While most reptiles lay eggs some give live

birth. Example: Blue tongue

skink

EXCEPTIONS

• Squamates (Snakes and Scaled Lizards)

• Turtles (You guess.)• Crocodilians (Alligators

and Crocodiles)• Tuataras (Lizard-like,

but not quite.)

• Around 8,000 species in all.

REPTILE FAMILIES

Squamates- Jointed skulls. Great biting power. Sheds skin.

Turtles- Protective shell provides camouflage. Freshwater and marine habitat.

Crocodilians- Large. Great biting power. Good camouflage.

Tuataras- Almost completely like squamates, no jointed skulls.

REPTILE FAMILIES

• Nearly all reptiles lay shelled eggs.• Nearly all reptiles are cold blooded.

• The size of reptile’s brains relative to their body is much smaller than that of mammals.

• Reptiles use a variety of methods to defend themselves from dangerous situations, such as

avoidance, camouflage, hissing and biting.• Crocodiles, alligators, turtles, tortoises, lizards, and

snakes are reptiles.• Lizard and snake species make up the largest number

of different reptiles.

FUN FACTS

Close relatives Birds are close relative to the reptiles. Scientists believe that the reason they are so closely related is because of the time of eggs they lay. The time of eggs laid is a one tooth egg the rest below the tree are two tooth egg. Many scientists believe that iguanas go at the top of the family tree. They believe that they were the first reptile way back in the dinosaur times.

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