1. Dept of Natural Resources Science, Univ. of Rhode Island Kingston RI USA
2. Rhode Island Dept of Environmental Management West Kingston RI USA
3. Canadian Wildlife Service Ottawa ON Canada
4. U.S. Geological Survey Patuxent Wildlife Research Center Laurel MD USA
5. U.S. Fish and Wildlife Service Anchorage AK USA
6. U.S. Fish and Wildlife Service, Migratory Birds Division Hadley MA USA
7. U.S. Geological Survey, Upper Midwest Environmental Sciences Center La Crosse WI USA
8. Cooperative Wildlife Research Laboratory, Dept of Zoology, Southern Illinois Univ. Carbondale IL USA
9. Canadian Wildlife Service Sackville NB Canada
10. Canadian Wildlife Service Québec City QC Canada
11. Dept of Biology, Acadia Univ. Wolfville NS Canada
12. Delta Waterfowl Bismarck ND USA
13. Sciences and Technology, Environment Canada Québec City QC Canada
14. Biodiversity Research Inst. Portland ME USA
15. Bird Studies Canada/Long Point Waterfowl and Wetlands Research Program Port Rowan ON Canada