Crotaphytidae - Information from Wikipedia on this family of desert-dwelling lizards native to the southwest USA and northern Mexico. Crotaphytus bicinctores: Great Basin Collared Lizard - Photographs of this species and its habitat, description, natural history and taxonomy. Crotaphytus vestigium: Baja California Collared Lizard - Photographs of this species and its habitat, a short video, description, natural history and taxonomy. Gambelia copeii: Cope's Leopard Lizard - Several photographs, description, natural history and taxonomy. Gambelia sila: Blunt-nosed Leopard Lizard - Photographs of this species and its habitat, description, natural history and taxonomy. Gambelia wislizenii: Long-nosed Leopard Lizard - Many photographs, a short video, description, natural history and taxonomy.