It is found in the Chihuahuan Desert region of the southwestern United States and northern Mexico.

Their coloration can vary, lighter or darker, depending on the soil and elevation of their localized habitat.

They have a thin body, smooth scales, and eyes with round pupils.

[1] Their preferred habitat is sandy and rocky semiarid regions, and it is often found in areas lightly vegetated with creosote and sagebrush.

Mating occurs in the spring, and the female lays a clutch of up to 24 eggs which hatch in the fall.