California and Mexico; from southern California southward through Baja California Peninsula. Also found on Danzante, Cerralvo, San Marcos, San José, and Tiburón islands.
Found in rocky habitats including canyons, mesas, desert grassland, woodland, and desert shrub. Generally stays in rocky upland areas. During the day, stay hidden in crevices.
Slender body with broad head; average adult length ranges from 24 - 36 inches long (61 - 91 cm). Brown to gray dorsum easily camouflages well into surrounding habitat. Displays around 35 dark blotches on dorsum. Namesake lyre shape exhibited on head. Belly varies from whitish to yellowish and possesses dark blotches. Vertical, cat-like pupils. Breeding habits not widely known.
Learn more with Schechter Natural History's Guide to Reptiles and Amphibians