1. Missouri Cooperative Fish and Wildlife Research Unit; Department of Fisheries and Wildlife Sciences; University of Missouri; 302 Anheuser-Busch Natural Resources Building Columbia MO 65211 USA
2. Department of Fisheries and Wildlife Sciences; University of Missouri; 302 Anheuser-Busch Natural Resources Building Columbia MO 65211 USA
3. The Institute for Bird Populations; PO Box 1346 Point Reyes Station CA 94956 USA
4. Missouri Cooperative Fish and Wildlife Research Unit; U.S. Geological Survey; 302 Anheuser-Busch Natural Resources Building Columbia MO 65211 USA
5. Arkansas Game and Fish Commission; 2 Natural Resources Drive; Little Rock AR 72205 USA
6. Missouri Department of Conservation; 3500 East Gans Road Columbia MO 65201 USA
7. Ducks Unlimited; 1 Waterfowl Way Memphis TN 38120 USA
8. Ducks Unlimited; 1220 Eisenhower Place Ann Arbor MI 48108 USA
9. Upper Mississippi River and Great Lakes Region Joint Venture; U.S. Fish and Wildlife Service; 2651 Coolidge Road, Suite 101 East Lansing MI 48837 USA