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The Louisiana Waterthrush breeds along pristine woodland streams in southern Ontario and possibly Quebec, the northern limit of its breeding range. The Atlas of the Breeding Birds of Ontario suggests that the population's occurrence within the province showed little overall change during the 20-year period spanned by the Atlases. The species was designated as Special Concern in 2006 by the Committee on the Status of Endangered Wildlife in Canada because of its small population (COSEWIC 2006). This species may be affected by habitat loss and increasing stream turbidity on its wintering and breeding grounds (COSEWIC 2006). This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
Habitat degradation, deforestation, and increasing stream turbidity may negatively impact the species on both its wintering and breeding grounds (COSEWIC 2006). Hemlock is an important habitat component in Ontario, and ongoing impacts from infestations of the invasive, introduced bug, Hemlock Woolly adelgid, may adversely affect this species (Mattsson et al. 2009). The Canadian Wildlife Service has been conducting targeted surveys to more accurately determine the distribution and abundance of the species in Ontario. Recent evidence suggests that this species may be an excellent bioindicator of stream ecosystem health (COSEWIC 2006). For information on the legal status of this species under the Species at Risk Act (SARA) and to view available recovery documents, see the SARA Registry.
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.