This snake is endemic to middle North America, and south into Mexico. In the USA, its range spreads from the southeastern parts of Arizona into southwestern New Mexico, and then western Texas. In Mexico, the patchnose snake can be found in eastern Sonora, to Chihuahua, and Sinaloa.
They thrive in desert habitats with areas of loose, sandy soil, from dry wash beds to rocky foothills. They are often seen active in the early daylight hours. Breeding occurs in April and May while the eggs are laid from May to August. The Big Bend patchnose snake feeds on smaller reptiles like lizards, snakes, reptile eggs, small mammals, and insects.
The patchnose snake is a non-venomous, medium-sized snake with an average length range of 24-32 inches. The dorsal background coloration is yellow or tan with two dark lateral lines down the length of the body. Consequently, there is also a tan-colored stripe in between the two lateral lines. The ventral scales are typically peach-colored and free of any dark pigment. The scales are smooth with the occasional specimen having keeled scales.
Learn more with Schechter Natural History's Guide to Reptiles and Amphibians