1. Department of Wildlife, Fish, and Conservation Biology; University of California, Davis; One Shields Ave Davis CA 95616 USA
2. U.S. Geological Survey; Western Ecological Research Center; Dixon Field Station 800 Business Park Drive Suite D Dixon CA 95620 USA
3. University of Georgia's Savannah River Ecology Lab; Drawer E Aiken SC 29802 USA
4. San Diego Zoo Institute for Conservation Research; 15600 San Pasqual Valley Rd Escondido CA 92027 USA