Yellow-backed Spiny Lizard

About the Yellow-backed Spiny Lizard

Sceloporus uniformis, also known as the yellow-backed spiny lizard, is a reptile of the family Phrynosomatidae. It is native to the Mojave, Great Basin, and San Joaquin deserts. Until recently, it was considered to be a subspecies of Sceloporus magister.

Sceloporus uniformis was originally described as a subspecies of Sceloporus magister in 1955. In 2006, genetic analysis revealed that S. uniformis is sufficiently distinct to merit classification as its own species. S. uniformis is a large robust lizard, and adults can grow to 5.5 inches in body length (snout-to-vent), with a tail slightly longer than the body. Color is brown or tan with yellow and black dorsal stripes or mottling and a black collar on the sides of the neck.

Males are larger than females, and have a swollen tail base, enlarged postanal scales and femoral pores, and bluish markings on the throat and belly. Females have a pale throat and underbelly, with faint or no blue markings. The head of a female may be orange or reddish in the breeding season.

This lizard is native to the Mojave, Great Basin, and San Joaquin deserts. It is endemic to the United States... Wikipedia →