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There are four subspecies of Common Eider: American, Hudson Bay, Northern and Pacific Common Eiders. The Pacific Common Eiders that breed in Canada nest in the central Canadian Arctic and overwinter in the ice-free regions around Bering Sea near Alaska. The Northern Common Eider breeds on small islands throughout the coastal areas of the eastern Canadian Arctic and winters along the coasts of Newfoundland and Labrador, Quebec, and southwest Greenland. The Hudson Bay Common Eider breeds within Hudson Bay and winters in open water leads near the Belcher Islands and off the western coast of Quebec, while the American subspecies breeds from south central Labrador coast in the north up to Massachusetts in the south. Much of the information available on the Common Eider comes from the American subspecies since the breeding colonies are more accessible. Detailed information on the population status of waterfowl species is available in the Population Status of Migratory Game Birds in Canada report (summarized version). To obtain a copy of the full version of this report, including tables and graphs, please contact MBRegs.Reports@canada.ca.
