Black-throated Blue Warbler
(Setophaga caerulescens)

Summary

Picture of bird
© Jukka Jantunen (flickr.com/photos/jukka_jantunen)
For additional photos and vocalizations, visit Dendroica. (Link opens in a new window.)

The Black-throated Blue Warbler is a common species limited to the hardwood and mixed wood forests of southeastern Canada. The species has shown a consistent, long-term increase throughout its range in Canada since the early 1970s; there are currently no major conservation concerns for the species. 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)Secure2015 
Bird Conservation Region StrategyPriority Species2013 

Population status

Geographic area or populationPopulation change relative to ~1970ReliabilityStatus in relation to goal
CanadaLarge IncreaseHighAt an Acceptable Level
 

Population estimate

Geographic area or populationPopulation estimate
Canada1,000,000 - 5,000,000 adults
 

Distribution maps

 

Migration strategy, occurrence

Long-distance migrant

Responsibility for conservation

Geographic areaResponsibility based on % of global population
CanadaHigh

General nesting period in Canada

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

Conservation and management

Populations of this species were much higher across the eastern hardwood forests prior to the European settlement period, when cutting of forests for farmland caused range-wide decreases (Holmes et al. 2017). The current population increase appears to be the result of farmland abandonment and subsequent return of deciduous and mixed-wood forests (Holmes et al. 2017). While there is currently little conservation concern, loss of forest in the Greater Antilles (Rubenstein et al. 2002) and a restricted winter distribution (Holmes et al. 2017) may be a source of future concern.

 

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
Atlantic Northern ForestsAtlantic Northern Forests, sub-region and priority type: Atlantic, NB -- Stewardship
Atlantic Northern ForestsAtlantic Northern Forests, sub-region and priority type: Quebec -- Stewardship
Boreal Hardwood TransitionBoreal Hardwood Transition, sub-region and priority type: Ontario and Manitoba -- Stewardship
Boreal Hardwood TransitionBoreal Hardwood Transition, sub-region and priority type: Quebec -- Stewardship
 

References