In the U.S. it is present in California, Nevada, Utah, Arizona, New Mexico, and Texas. In California it is found mainly as southern coastal populations existing below 600 m (2,000 ft), but some have been found up to 950 m (3,120 ft). Nevada represents the northernmost extent of its range: it is found in the southern tip of the state; the northernmost breeding population is found in Nye County, near Tonopah.