Some turtles hide their heads by bending their necks sideways. Turtles vary in size. Small North American box turtles can be six inches long, while the huge leatherback sea turtles can reach eight feet in length. Turtles do not have teeth. While some turtles are vegetarians, most are omnivorous.
Turtles lay their eggs in sand or dirt.
A few turtles live a long time, some reaching 100 years. The eggs are leathery, rather than hard like bird eggs. Some pond turtles have webbed feet. One of the largest pond turtles in the world is the alligator snapping turtle. It can get up to 200 pounds.