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The Least Flycatcher nests in clustered territories across Canada from the Yukon and Northwest Territories south to the United States border and east to Newfoundland. In Canada, Breeding Bird Survey data show a moderate decrease in the population relative to about 1970. With an estimated 88% of the global breeding population, Canada's responsibility for the species' conservation is very high. The Least Flycatcher is a candidate wildlife species for assessment by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
The Least Flycatcher, which forages mainly on flying insects, tends to have higher pesticide burdens than frugivores or granivores (Tarof and Briskie 2008). The species also appears sensitive to disturbance from logging activities, forest degradation caused by acid rain, and the loss of understory due to natural succession as well as excessive browsing by white-tailed deer (Tarof and Briskie 2008).
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.