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The Townsend's Warbler breeds in mature, coniferous forests of western Canada. It is best monitored by the Breeding Bird Survey, the results of which indicate a decrease in the national population of approximately 20% since 1970; a level that is within the boundaries considered to be of little overall change. However, in the mountain forests in the northern portion of its range, it is not well monitored. At the regional level, the population status varies from little overall change to large decreases. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
The Townsend's Warbler breeds at a variety of elevations, primarily in coniferous and sometimes in mixed coniferous-deciduous forests of western Canada (Wright et al. 1998). They are associated with tall trees and greater canopy closure, with higher breeding abundance more often associated with older forests and larger trees (Wetmore et al. 1985, Matsuoka et al. 1997, Wright et al. 1998, but see Bryant et al. 1993). The loss of mature and older forests (Hejl et al. 1995) is likely contributing to declines.
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.