During the hot part of the day, snakes move to shaded areas, and on cool days they sun themselves in warm open areas. Snakes often seek out paved roads where they are attracted by the heat from the road surface. Because snakes have a backbone, they are classified as vertebrates. Although fish, birds and mammals, including people, are also vertebrates, the snake's skeletal system is unique. Snake bones are very light, and the skeleton is very flexible.
Snakes are specialized animals, with no legs, ears or eyelids.
Rarely, the sex organs of a snake may protrude from the anal plate area and be confused with legs. If the snake detects food and is hungry, it will pursue the animal. Snake scales and skin help retain body moisture. Snakes shed their skin and eye coverings together. Soon after temperatures rise in the spring, snakes come out of hibernation and mate.