There are approximately 13 species in the genus Uromastyx . Members of this genus are referred to as dab lizards or spiny tailed lizards. The other seven species are seldom if ever imported. Uromastyx aegypticus is the largest member of the genus with individuals reaching 30 inches or more in total length and weighing several pounds. The other species are usually under 14 inches in total length.
Coloration is variable between and within species.
Uromastyx aegypticus and Uromastyx hardwicki are usually dark to light brown. Uromastyx acanthinurus can be yellow, green, bright orange or a combination of these colors. Uromastyx ornatus are sexually dimorphic with adult males being green or blue green with blotches of yellows and oranges. Females have more subtle yellows, browns, and some orange. Some, Uromastyx acanthinurus and Uromastyx aegypticus , can be very shy, often retreating to a hide spot when someone approaches the cage.