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Reptiles were the first true land-dwelling vertebrates. The appeared over 300 million years ago. Common reptiles include snakes, lizards, turtles, crocodiles and alligators.

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Reptiles

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Crocodile
The most noticeable feature of reptiles are the scales that cover their body.

Although reptiles breathe through lungs, some reptiles can also absorb oxygen in water through membranes in their mouth.

Reptiles are often called cold-blooded because they can't regulate their own body temperature. Their body temperature depends on the external temperature.

Crocodiles and alligators are large amphibious reptiles. They can walk on land using their webbed feet. They can also use their long tail to swim in water. Crocodiles feed on large animals they catch on land or in water. They have powerful jaws and teeth to tear apart their prey.

Turtle
The turtle and tortoise are different from other vertebrates in that they have a shell. The shell is made of skin tissue and bony plates.

Giant tortoises can grow up to 4 feet long and live about 100 years.

 

Books on Reptiles

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Other links on Reptiles

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Reptiles http://www.enchantedlearning.com/subjects/
reptiles/printouts.shtml
   
 

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