Thamnophis, mainly found near water in mountainous or hilly areas of the southwestern United States and Mexico.
There are two known species of the blackneck garter snake: Thamnophis cyrtopsis cyrtopsis and Thamnophis cyrtopsis ocellatus.
Western blackneck garter snakeEdit
Thamnophis cyrtopsis cyrtopsis
The western blackneck garter snake is on average 42 inches long. The snake is colored dark olive with an orange-yellow stripe that is displayed on the middle of the body from the top while the underside is usually a cream or light shade of gray. The western blackneck is a water snake that lives near rivers, swims, and eats small fish and tadpoles.
Eastern blackneck garter snakeEdit
Thamnophis cyrtopsis ocellatus
The eastern blackneck garter snake is smaller than the western blackneck garter snake, with an average length of less than 20 inches. It is frequently found on dry land near a water source rather than in water. It displays three light stripes on a dark-colored body with uniform orange and orange-yellow spreading throughout.