Of the 15 species of spiny-tailed lizards about 8 are now captive bred. All species are rather quiet and confiding, and all are popular with hobbyists. Males of some species are colorful.
These lizards are sun-basking, heat-loving, arid-land specialists. They have developed special adaptations. In the morning, they are dark gray to black, as the dark color absorbs the heat when they are still cold from the chilly night.
When the body temperature becomes optimal, the color changes to light sandy beige. They use their heavy spiny tails for defense and also for showing aggressive behavior.