The male Surf Scoter's bill is among the most unique among Canada's birds, with its candy corn colours and bulbous shape. It eats a wide variety of marine aquatic invertebrates, including some with hard shells like clams, which are swallowed whole and ground up in the digestive system.
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Surf Scoter
Two populations of Surf Scoter are recognized in North America. The western population breeds primarily in Alaska, but also in northern Yukon and the northwestern Northwest Territories, and to a lesser degree in British Columbia, Alberta and Saskatchewan; it winters along the Pacific coast. The eastern population breeds in the eastern Northwest Territories (south Keewatin), in the Hudson Bay lowlands (in Manitoba and Ontario), and throughout central Quebec and Labrador, and winters mostly along the Atlantic coast, with smaller numbers on the lower Great Lakes.
Approximately 170,000 individuals breed in western Canada, with another 190,000 in Alaska, most of which may pass to or through Canada as migrants. There are approximately 150,000 individuals in the eastern population. Combined, roughly 320,000 individuals breed in Canada, representing 63% of the global total and a high degree of responsibility for Canada; with migrants from Alaska added in, the total for Canada rises to 510,000, which is 85% of the global number and corresponds to a very high level of responsibility.
Whereas the western population and the overall national population have shown little change in abundance based on regional and continental analysis of the Christmas Bird Count, the eastern population has experienced a moderate increase based on the Eastern Waterfowl Survey. All estimates have medium confidence, given limitations to survey reliability and some variability among sources. Both the regional populations and the national population are within their goal ranges.
Several surveys provide insight into the status of Surf Scoter in Canada, each of which have different strengths and weaknesses. Overall, the Christmas Bird Count (CBC) is likely to best reflect national status, as it is the only program which samples a broad proportion of the range and has high precision in its estimates, although it is less standardized than some other surveys. The Breeding Bird Survey (BBS) also provides results at a national scale, but mostly samples the southern edges of the breeding range and has low precision. The Eastern Waterfowl Survey (EWS) provides medium reliability coverage of the Eastern population, but only dating back to 1990. Similarly, the British Columbia Coastal Waterbird Survey (BCCWS) has medium reliability for the Western population but just since 1999.
The continental CBC trend shows some fluctuations over time, but overall little change relative to 1970. Although the BBS indicates a moderate decrease of 49% over the same period, its coverage and precision are too low to warrant adjusting the status. The EWS shows a moderate increase of 42%. The Pacific Coast CBC trend shows a long-term trend of -18%, within the range of little change, but the BCCWS indicates a 27% decline over a shorter period, indicating potential for a moderate decrease.
For both the western and national populations of Surf Scoter, the goal is to maintain abundance at or above the level it was at in the early 1970s, based on the Pacific Coast and continental analyses of the Christmas Bird Count, respectively. Recent data show that these populations are within their goal ranges.
The goal for the eastern population of Surf Scoter is to remain at or above its recent population level, based on the Eastern Waterfowl Survey. Trend data show that this population is currently within its goal range.
| Designation | Geographic Area | Status | CITATION |
|---|---|---|---|
| IUCN | Global | Least Concern | |
| Wild Species | Canada | Secure |
The male Surf Scoter's bill is among the most unique among Canada's birds, with its candy corn colours and bulbous shape. It eats a wide variety of marine aquatic invertebrates, including some with hard shells like clams, which are swallowed whole and ground up in the digestive system.
Surf Scoter is reported throughout the year in Canada, though less often in summer when it moves to more secluded breeding habitats.