1. Department of Biological Sciences, Eastern Illinois University, Charleston, Illinois, USA
2. Institute for Bird Populations, Point Reyes Station, California, USA
3. Department of Biological Sciences, The University of Southern Mississippi, Hattiesburg, Mississippi, USA
4. Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, Illinois, USA
5. U.S. Geological Survey, Northern Rocky Mountain Science Center, Bozeman, Montana, USA
6. Department of Biology, Southern Utah University, Cedar City, Utah, USA