Checkered Garter Snake

Thamnophis marcianus, commonly known as the checkered garter snake, is a species of garter snake endemic to the southern United States, Mexico and Central America. The specific name or epithet, marcianus, is in honor of American Brigadier General Randolph B. Marcy, who led surveying expeditions to the frontier areas in the mid 19th century.

The checkered garter snake is typically green in color, with a distinct, black checkerboard pattern down its back. It is capable of growing to a total length of 42 inches (107 cm), but 28 inches (71 cm) is closer to average.