Black-throated Gray Warbler
(Setophaga nigrescens)

Summary

Picture of bird
© Chuck Kling
For additional photos and vocalizations, visit Dendroica. (Link opens in a new window.)

In Canada, the Black-throated Gray Warbler is restricted to southwestern British Columbia, where it is monitored by the Breeding Bird Survey (BBS). BBS results suggest that abundance has decreased since the early 1970s, both in Canada and within the continental population. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.

Designations

Main designations for the species
DesignationStatusDateSubspecies, population
IUCN (Global)Least concern2018 
Wild Species (Canada)Apparently secure2015 
Bird Conservation Region StrategyPriority Species2013 

Population status

Geographic area or populationPopulation change relative to ~1970ReliabilityStatus in relation to goal
CanadaModerate DecreaseMediumBelow Acceptable Level
 

Population estimate

Geographic area or populationPopulation estimate
Canada50,000 - 500,000 adults
 

Distribution maps

 

Migration strategy, occurrence

Long-distance migrant

Responsibility for conservation

Geographic areaResponsibility based on % of global population
CanadaLow

General nesting period in Canada

Nesting period starts between mid-May and late May and ends in early August, depending on the region. Before or after this period, the probability of an active nest is lower.
 

Conservation and management

The Black-throated Gray Warbler breeds in mixed forests of various ages. Reductions of diverse early-seral forest as a result of forest management that favours conifer plantations may have negative effects on the population (Betts et al. 2010). The species' limited distribution and habitat use in Canada overlaps with areas that are under significant development pressures, which will continue to result in permanent habitat loss.

 

Bird conservation region strategies

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:

  • conservation concerns (i.e., species vulnerable due to population size, distribution, population trend, abundance, or threats)
  • stewardship responsibilities (i.e., species that typify the regional avifauna or have a large proportion of their range or population in the sub-region)
  • management concerns (i.e., species that require ongoing management because of their socio-economic importance as game species, or because of their impacts on other species or habitats)
  • other concerns (i.e., species deemed a priority by regional experts for other reasons than those listed above or because they are listed as species at risk or concern at the provincial level)

Select any of the sub-regions below to view the BCR strategy for additional details.

BCRs, marine biogeographic units, and sub-regions in which the species is listed as a priority
RegionSub-region and priority type
Northern Pacific RainforestNorthern Pacific Rainforest, sub-region and priority type: Pacific and Yukon -- Stewardship
 

References