1. Department of Environmental and Forest Biology; State University of New York College of Environmental Science and Forestry; Syracuse NY 13210 USA
2. Prairie and Northern Wildlife Research Centre; Science and Technology; Environment and Climate Change Canada; Saskatoon SK S7N 0X4 Canada
3. National Audubon Society; P.O. Box 1359 Buxton NC 27920 USA
4. U.S. Fish and Wildlife Service; South Carolina Field Office; Charleston SC 29407 USA
5. National Audubon Society; Wilmington NC 28411 USA
6. Department of Fisheries, Wildlife, and Conservation Biology; University of Minnesota; St. Paul MN 55108 USA
7. Department of Fish and Wildlife Conservation; Virginia Polytechnic Institute and State University; Blacksburg VA 24061 USA