They are small terrestrial reptiles.
They have a shell to protect their body.
They crawl.
They are very large reptiles.
They use their large teeth to capture their prey.
They spend a lot of time in water.
They have four legs, and a body covered with hard scales.
They can extend their head, legs and tail through openings in the shell.
They have four very short legs.
They lay their eggs on land.
Most of them live on land.
They have long bodies with no limbs.
Many of them are aquatic.
They slither.
