DistributionRead full entry
Global Range: (1000-5000 square km (about 400-2000 square miles)) The original range included northern Baja California Norte (Mexico), and San Diego, Orange, and Riverside Counties, California (Garth and Tilden, 1986). Range has been very largely altered to the extent that very little of it is now occupiable or restorable. See USFWS (1994). USFWS (2003) recognized this butterfly as extant in San Diego and Riverside Counties in California. It is believed to still occur in Mexico. Based on their maps there are two major currently or recently occupied areas, which together are well over 500 square miles, and a few colonies well to the east near the Mexican border, but this does not account for the extension into Mexico of the latter two. These three areas are separated by much larger intervening areas. If the intervening areas are not included the range seems a bit under 1000 square miles. If these three areas are connected one gets close to a right triangle of 90 by 40 miles, roughly 1800 square miles. Portions of the range farther to the north with no recent records are not included.