1. Institute for Wetland and Waterfowl Research; Ducks Unlimited Canada; Stonewall MB R0C 2Z0 Canada
2. Environment and Climate Change Canada; Prairie and Northern Research Center; 115 Perimeter Road Saskatoon SK S7N 0X4 Canada
3. Ducks Unlimited, Inc.; Memphis TN 38119 USA
4. Division of Migratory Bird Management; U.S. Fish and Wildlife Service; Bowie MD 20715 USA
5. USGS SD Cooperative Fish & Wildlife Research Unit; South Dakota State University; Brookings SD 57007 USA
6. USGS Patuxent Wildlife Research Center; 12100 Beech Forest Road Laurel MD 20708 USA
7. Ducks Unlimited, Inc.; Menoken ND 58558 USA
8. Natural Resources and Environmental Science; University of Nevada Reno; Reno NV 89557 USA
9. Division of Migratory Bird Management; U.S. Fish and Wildlife Service; Easton MD 21601 USA
10. Division of Migratory Bird Management; U.S. Fish and Wildlife Service; Littleton CO 80127 USA
11. U.S. Fish and Wildlife Service; Marine on Saint Croix; MN 55047 USA
12. Department of Entomology and Wildlife Ecology; University of Delaware; Newark DE 19716 USA