Checkered Garter Snake

Thamnophis marcianus

The checkered garter snake, Thamnophis marcianus, is a small to medium-sized North American colubrid found in the southwestern United States, Mexico, and parts of Central America. It is named for the dark checkerboard pattern along the body, usually combined with a pale yellow or cream stripe down the back. Like other garter snakes, it has keeled scales, gives birth to live young, and naturally eats a mix of amphibians, fish, earthworms, and small vertebrates near water or damp cover.

Captive-bred checkered garter snakes are kept by some reptile hobbyists because they stay manageable in size and are often active during the day. They need a secure enclosure, a warm basking area, hiding places, and constant access to clean water without being kept wet all the time. Diet deserves planning: feeder fish alone can create nutritional problems, so keepers usually use varied, parasite-safe foods and supplements when needed. Collection, sale, and transport rules vary by location, especially for wild-caught snakes.