1. Department of Natural Resources Science University of Rhode Island Kingston Rhode Island 02881USA
2. Rhode Island Department of Environmental Management 277 Great Neck Road West Kingston Rhode Island 02892 USA
3. Canadian Wildlife Service 335 River Road Ottawa Ontario K1A 0H3 Canada
4. U.S. Geological Survey Patuxent Wildlife Research Center 12100 Beech Forest Road Laurel Maryland 20708 USA
5. Sea Duck Joint Venture U.S. Fish and Wildlife Service 1011 East Tudor Road Anchorage Alaska 99503 USA
6. Migratory Birds Division U.S. Fish and Wildlife Service 300 Westgate Center Drive Hadley Massachusetts 01035 USA
7. U.S. Geological Survey Upper Midwest Environmental Sciences Center 2630 Fanta Reed Road La Crosse Wisconsin 54603 USA
8. Cooperative Wildlife Research Laboratory Department of Zoology Southern Illinois University 251 Life Science II, Mail Code 6504 Carbondale Illinois 62901 USA
9. Canadian Wildlife Service Sackville New Brunswick E4L 1G6 Canada
10. Canadian Wildlife Service 801‐1550 Ave D'Estimauville Quebec City Quebec G1J 0C3 Canada
11. Department of Biology Acadia University 15 University Avenue Wolfville Nova Scotia B4N 3J2 Canada
12. Delta Waterfowl 1312 Basin Avenue Bismarck North Dakota 58504 USA
13. Sciences and Technology, Environment Canada 1141 Route de l’Église Sainte‐Foy Quebec G1V 4H5 Canada
14. Biodiversity Research Institute 276 Canco Road Portland Maine 04103 USA
15. Department of Environmental and Forest Biology State University of New York College of Environmental Science and Forestry 1 Forestry Drive Syracuse New York 13210 USA