(Urosaurus auriculatus)
This species is endemic to the Pacific island of Isla Socorro (132 km²),in the Archipielago Revillagigedo of Colima State,Mexico.The species is generally distributed throughout Socorro,being absent from areas of erosion that have resulted from overgrazing by sheep (Arnaud et al.1993).Animals range from sea level to the top of the Everman volcano at around 1,040 m asl (Arnaud et al.1993).