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The widespread but sparse population of Northern Shrike is distributed throughout Canada's taiga and tundra habitats. Most birds migrate to southern Canada and the United States for the winter, but some birds stay year-round on the breeding grounds. The Christmas Bird Count monitors the species on its wintering ground; results indicate little overall change in the population since about 1970. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
Populations of this species are influenced by severe weather and food supply on the breeding grounds (Cade and Atkinson 2002). Anthropogenic changes to habitats in the wintering range of the species may have negatively affected the species in some areas (Cade and Atkinson 2002). Climate warming is expected to influence distribution by expanding the treeline northward (Cade and Atkinson 2002). Some birds may remain farther north in winter due to an increase of bird feeders and prey availability at the feeders (Cade and Atkinson 2002).
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.