DESCRIPTION: A medium-sized (up to 108 mm or 4.25″ from snout to vent), plump-bodied lizard with a large head and two distinct, black collar markings on the neck. On males the front collar completely encircles the neck. Coloration is usually gray-brown with faint, soft-edged, yellow or orange crossbands. The feet and limbs are often tinted with yellow-orange and the back is usually marked with many white or cream colored dots. This pattern reverses on the tail and hind limbs becoming gray-brown dots on a light background. The underside is plain and pale. The scales are small and granular. The tail is taller than it is wide distinguishing this lizard from the similar Eastern Collared Lizard and Sonoran Collared Lizard. Males have dark blue-gray to black patches on the throat and groin and a pale stripe running down the top of the tail. Females are duller in color and have orange markings on the sides when gravid.

DISTRIBUTION: This lizard is distributed across our northwestern deserts and western deserts north of the Gila River. In our state it occurs at elevations ranging from about 700′ to over 6,500′.

HABITAT: Primarily an inhabitant of Sonoran Desertscrub, Mohave Desertscrub, Great Basin Desertscrub, and Great Basin Grassland. Also enters Interior Chaparral and Great Basin Conifer Woodland communities in some areas. Frequents hillsides, canyons, and slopes with numerous large rocks. Infrequently encountered on relatively flat terrain lacking large rocks.

BEHAVIOR: Primarily diurnal. Occasionally evening-crepuscular. It often basks in the mid-morning sun atop large rocks which serve as lookouts for prey. It hibernates during the cold months of winter and late fall. At top speeds this lizard lifts the forelimbs off the ground and runs on its hind limbs. Like other collared lizards this lizard is territorial and aggressive to other males. It does not hesitate to bite when captured and it can easily draw blood with its powerful jaws. Unlike many of our lizards collared lizards can not cast off and regenerate the tail.

DIET: It uses its powerful jaws to capture insects, spiders, and lizards. It also occasionally eats some plant material.