Affiliation: | 1. The Institute for Bird Populations, P.O. Box 1346, Point Reyes Station, CA, 94956 USA;2. Ecology and Evolutionary Biology, University of Connecticut, 75 N. Eagleville Road, Unit 3043, Storrs, CT, 06269 USA;3. Department of Biology, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA, 94132 USA;4. Amador Ranger District, Eldorado National Forest, USDA Forest Service, 26820 Silver Drive, Pioneer CA, 95666 USA |