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One of the classic spruce budworm specialists of the boreal forest, populations of Cape May Warbler fluctuate with the increases and decreases of spruce budworm in Canada's boreal forest. However, results from the Breeding Bird Survey show little overall change in the warbler population since about 1970. Cape May Warblers were likely more common in the twentieth century than earlier due to the increased frequency of budworm outbreaks (Baltz and Latta 1998). Currently, there appear to be few major threats to the species. With an estimated 98% of the global breeding population Canada's responsibility for the species is very high. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
Cape May Warblers have relatively broad habitat requirements on both their breeding and wintering grounds, so it appears that threats to the species are currently minimal (Baltz and Latta 1998). Changes in forest age structure from forestry operations and the control of insect outbreaks may adversely affect Cape May Warbler populations (Baltz and Latta 1998; see also Venier et al. 2009). Although the species' wintering range is relatively small and restricted to the West Indies, its flexible use of settled areas and urban gardens bodes well for its long-term security there (Baltz and Latta 1998).
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.