Lampropeltis mexicana greeri (also known as Greer's Mexican kingsnake) is a snake species native to the mountains of the Mexican state of Durango. They have a light silver-gray to tan coloration. They are a high altitude snake that can reach up to 36 inches long in adulthood. They have a strict diet of mice and lizards, consuming pinkies and small lizards as juveniles, and preferring large mice and lizards as adults. They need a hiding space at all times since they are relatively shy.