Central Washington to tip of Baja, California, north Sinaloa and Durango; Pacific Coast to western Colorado and western Texas
The habitat varies: sand, rock, hardpan, or loam with vegetation of grass, bushes, and scattered trees. Often found along sandy washes where there are scattered rocks and low-growing bushes. Can be found in areas up to 9000 feet.
On the under-surface of its long, tapering tail are horny scales which form a supplementary support and help the animal to climb and hold on to branches. A small brownish lizard with a bluish or black blotch on the side of the chest behind the axilla. Side blotch occasionally absent.
This lizard usually lives in rock crevices, a small mammal\\\'s empty hole or a gap under a stone. Spends most of its time on rising ground where it watches for insects. These lizards are very territorial. When a border transgression occurs, the legitimate proprietor rushes at the intruder making a threatening display to intimidate it. The side-blotched lizard lives in pairs.
Oviparous. Female lay three clutches of two to six eggs and incubation lasts about 60 days. Young are two to three inches long at birth.
The side-blotched lizard, known also as Stansbury\\\'s iguana, is a close relative of the large iguanas.