A young Texas Indigo Snake (Drymarchon melanurus erebennus) on sandy ground

The Middle American indigo snake, also known commonly as the blacktail cribo, is a species of large, nonvenomous, snake in the family Colubridae. The species is native to the southwestern United States, Mexico, Central America, and northern South America. In addition to the nominotypical subspecies, it has four other recognized subspecies, including "D. m. erebennus" commonly known as the Texas indigo snake.