The family Crotaphytidae is comprised of 2 genera and 12 species, and they are found in North and Central America (Pough et al. 1998).  The lizards in this family are moderately sized and occupy mesic or arid regions.  An interesting characteristic is that the lizards in this family include other vertebrates in their diet.  In Idaho, both the Longnose Leopard Lizard (Gambelia wislizenii) and the Mojave Black-collared Lizard (Crotaphytus bicinctores) eat other lizards.