The gray-banded kingsnake, sometimes referred to as the alterna or the Davis Mountain king snake, is a species of nonvenomous snake in the family Colubridae. The species is endemic to the southwestern United States and adjacent Mexico. Some sources list two distinct subspecies of Lampropeltis alterna, as L. a. alterna and L. a. blairi differentiated by patterning and locale, but research has shown them to be color morphs of the same species.
Tropidoclonion is a genus of snake in the subfamily Natricinae of the family Colubridae. The genus is monotypic, containing the sole species Tropidoclonion lineatum, commonly known as the lined snake. The species is endemic to North America.
The black swamp snake is a species of snake in the subfamily Natricinae of the family Colubridae. The species is endemic to the southeastern United States. There are three subspecies, including the nominotypical subspecies.
The long-nosed snake is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America. It has two recognized subspecies. The other species in the genus were previously considered subspecies.
Salvadora is a genus of colubrid snakes commonly called patchnose snakes or patch-nosed snakes, which are endemic to the western United States and Mexico. They are characterized by having a distinctive scale on the tip of the snout.
Gyalopion is a genus of small nonvenomous colubrid snakes. Species in the genus Gyalopion are commonly referred to as hooknose snakes, and are native to the southwestern United States and Mexico.
The Trans-Pecos rat snake or Davis Mountain rat snake, is a species of medium to large, nonvenomous rat snake in the family Colubridae. Bogertophis subocularis is endemic to the Chihuahuan Desert.
The eastern racer or North American racer is a species of nonvenomous snake in the family Colubridae. The species is endemic to North America and Central America. Eleven subspecies, including the nominotypical subspecies, are recognized, which as a group are commonly referred to as the eastern racers. The species is monotypic in the genus Coluber.
The night snake is a species of rear-fanged colubrid. It is found in Mexico.
Hypsiglena jani, commonly known as the Texas night snake or the Chihuahuan night snake, is a small species of mildly venomous snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico.
Ficimia streckeri, also commonly known as the Mexican hooknose snake, the Tamaulipan hooknose snake, and the Texas hook-nosed snake, is a small species of snake in the family Colubridae. The species is native to northeastern Mexico and adjacent southern Texas.
Pantherophis bairdi is a species of harmless snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico. No subspecies are recognized as being valid.
Butler's garter snake is a species of garter snake in the family Colubridae. The species is endemic to North America.
The two-striped garter snake is a species of aquatic garter snake, which is endemic to western North America.
The striped whipsnake is a species of nonvenomous snake in the family Colubridae. It is closely related to the California whipsnake. The striped whipsnake is native to the western United States and adjacent northern Mexico.
The northwestern garter snake is a species of snake in the family Colubridae. The species is endemic to North America.
The southern ribbon snake(Thamnophis saurita sackenii), also known commonly as the peninsula ribbon snake and the Florida ribbon snake, is a subspecies of garter snake in the family Colubridae. It is one of four subspecies of the ribbon snake.
Thamnophis proximus, commonly known as the western ribbon snake, is a species of garter snake in the subfamily Natricinae of the family Colubridae. The species is endemic to the western United States, Mexico, and Central America. The species has six recognized subspecies.
Senticolis is a genus of nonvenomous snake in the family Colubridae. The genus Senticolis is monotypic, containing the sole species Senticolis triaspis, also known as the green rat snake. The species is endemic to Central America, Mexico, southern Arizona, and southern New Mexico.
Micruroides is a genus of venomous coral snake in the family Elapidae. The genus is monotypic, containing only the species Micruroides euryxanthus.
