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Dunlins breed in wetlands across the circumpolar subarctic and Mid Arctic. Three subspecies occur in North America; Calidris alpina arcticola and C. a. hudsonia breed in the western and eastern Canadian Arctic respectively, while C. a. pacifica breeds in western Alaska but winters in coastal British Columbia. The subspecies may have different population trends, but the survey most representative of the species overall suggests that Dunlin has shown little change in abundance in Canada relative to about 1970, although the reliability of this assessment is considered low. Nevertheless, habitat loss and degradation is of concern for Dunlin because they winter in heavily populated coastal areas. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
The Dunlin winters in coastal habitats of North America, including many areas where habitats are under significant pressure from development and disturbance. Large numbers also winter in the Central Valley of California, where intensive agriculture exposes Dunlin to potentially harmful levels of chemicals (Warnock and Gill 1996).
Environment and Climate Change Canada and partners have developed Bird Conservation Region Strategies in each of Canada’s Bird Conservation Regions (BCRs). In these strategies, selected species are identified as priorities for one or more of the following reasons:
Select any of the sub-regions below to view the BCR strategy for additional details.