The leopard lizards comprise the Gambelia within the family Crotaphytidae. Leopard lizards are indigenous to arid environments of southwestern North America. One difference between the genera Gambelia and Crotaphytus is that leopard lizard have fracture planes in their tails, allowing the tails to break off when grasped by predators. ==Classificat... Found on http://en.wikipedia.org/wiki/Gambelia