Juvenile. Notice the Blue tinged tail & rear feet.
Teiidae is a family of lizards native to the Americas, generally known as whiptails. The group includes the parthenogenic genera Cnemidophorus and Aspidoscelis, and the non-parthenogenic Tupinambis. It has over 230 member species in ten genera. About 75% of the species are in two dominant genera, Aspidoscelis and Cnemidophorus.