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. Others, Uromastyx ornatus , will often be tame. Individuals differ in their behaviors and you can find exceptions to the above generalizations. Large numbers of Uromastyx aegypticus and U. ornatus have been imported into the country during the last few years. The U.S. Fish and Wildlife Service estimated that 7,000 members of the genus were brought in 1994.