Turtles have been around a long time, the earliest known turtles roamed the earth over 200 million years ago. Today there are over 300 different types of turtles around the world. Some, like many of the large sea turtles, are endangered but others, like the painted turtles pictured here, can be found at most lakes or ponds.
Like all reptiles, turtles are ectothermic, which means that they can not regulate their own body temperature. This is the reason why you often see turtles resting on logs, rocks, or other platforms during sunny days. They use the sun to help warm up their cold blooded bodies. During the winter they will bury themselves in mud at the bottom of the lake or pond and go into a sort of dormant or state. Even though they breath air like we do turtles can survive around 5 months with out breathing while they are hibernating.