Above, this looks to us like a Queen Butterfly (Danaus gilippus strigosus), one of two kinds of Milkweed Butterflies. This one was feeding on Velvet Mesquite Blooms near the Diversion Tank in Pool Wash in mid-August 2004.
Note: this page is inchoate. Our own knowledge of the butterflies of Saguaro Juniper lands is at that stage as well (aside from our paucity of images so far). A superb new book, Butterflies of Arizona: A Photographic Guide (2001), by Bob Stewart, Priscilla Brodkin & Hank Brodkin, provides a major source for our future identification work. Meanwhile, the best sites we know on the Web for guiding studies near our area are (1) this link: Butterflies of Southeast Arizona (compiled by Bruce Walsh of the Department of Ecology and Evolutionary Biology at the UA; (2) the Sonoran Arthropod Studies Institute -- go to that link and click on "Butterflies of Coronado National Memorial". This will take you to listings and photographs of butterflies found in this park, which is located right on the U.S.-Mexico border in the lower reaches of the Huachuka Mountain range.