1. Resources Management and Science Division, Yosemite National Park, 5083 Foresta Road, El Portal, CA 95318 USA; Earth Research Institute, University of California, Santa Barbara, 6832 Ellison Hall, Santa Barbara, CA 93106 USA;
2. Environmental Studies Program, University of California, Santa Barbara, 4312 Bren Hall, Santa Barbara, CA 93106 USA
3. Rana Resources, PO Box 2185, Davis, CA 95617 USA; Research Associate, Department of Herpetology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118 USA
4. Resources Management and Science Division, Yosemite National Park, 5083 Foresta Road, El Portal, CA 95318 USA