1. Arizona Cooperative Fish and Wildlife Research Unit School of Natural Resources and the Environment University of Arizona ENR2 Room N315, 1064 East Lowell Street Tucson Arizona 85721 USA
2. U.S. Geological Survey Arizona Cooperative Fish and Wildlife Research Unit School of Natural Resources and the Environment University of Arizona ENR2 Room N315, 1064 East Lowell Street Tucson Arizona 85721 USA
3. U.S. Fish and Wildlife Service Southern Nevada Fish and Wildlife Office 4701 North Torrey Pines Drive Las Vegas Nevada 89130 USA