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The Pacific-slope Flycatcher was recognised as a distinct species in 1989 (American Ornithologists' Union 1989) when the "Western Flycatcher" complex was split into Cordilleran and Pacific-slope Flycatchers. Almost all of its Canadian range is within British Columbia. Breeding Bird Survey results indicate little overall change in the population since about 1970, despite fluctuations over the years. The population generally increased through the mid-1990s, only to gradually decrease. The cause of this recent decline is unclear. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
Recent speculation that the Pacific-slope Flycatcher may be a "molt-migrant" (Carlisle et al. 2009; i.e., a migration pattern in which birds move from the breeding ground to a temporary location to molt, then continue to migrate to a wintering range) may lend greater importance to migration and stop-over sites. This species may be subject to similar threats facing other aerial insectivores (see, for example, Nebel et al. 2010).
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.