Thamnophis elegans or the Western Terrestrial Garter Snake is a species of colubrid snake residing only in Southwestern Canada, and Western United States. Seven subspecies are currently recognized. Most snakes have a yellow, light orange, or white dorsal stripe, accompanied by two stripes on its side of the same color. Some varieties have red or black spots between the dorsal stripe and the side stripes. This snake often inhabits coniferous forests, and is relatively aquatic. It an immensely variable species, and give even the most experienced herpetologist trouble when it comes to identification. They are a medium sized snake, at a size of about 18"-41". This snake is only one of two garter snakes known to cannibalise. It will eat just about anything it can find, and is found at altitudes of up to 13,000 feet (3,962 metres).