MacGillivray's Warbler
(Geothlypis tolmiei)

Summary

Picture of bird
© Glen Tepke (www.pbase.com/gtepke)
For additional photos and vocalizations, visit Dendroica. (Link opens in a new window.)

The MacGillivray's Warbler breeds in moist, open forests in the mountains of western Canada. It is best monitored in Canada by the Breeding Bird Survey, data from which indicate an overall moderate decrease since 1973, with a steeper rate of decrease during the most recent decade. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.

Designations

Listing of the main designations for the species
DesignationStatusDateSubspecies, population
IUCN (Global)Least Concern2012 
Wild Species (Canada)Secure2010 
Bird Conservation Region StrategyPriority Species2013 

Population status

Geographic areaStatusReliability
CanadaModerate DecreaseMedium
 

Population estimate

Canada5,000,000 to 50,000,000 adults
 

Distribution maps

 

Migration strategy, occurrence

Long-distance migrant

Responsibility for conservation of world population

CanadaHigh

Conservation and management

MacGillivray's Warbler depends on riparian habitat during migration and breeding. The populations usually respond positively in the short term to logging and mining practices in boreal Canada that open up forests and promote the growth of dense shrubbery. However, replanting of forest to pine plantations is thought to reduce habitat quality and population densities by preventing the dense undergrowth habitat which the species needs for breeding (Pitocchelli 2013). The population decline seems to be steepening in recent years, perhaps a result of habitat changes related to forest succession, harvest patterns and decreasing quality of riparian habitat.

 

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
Great BasinGreat Basin, sub-region and priority type: Pacific and Yukon Region
Northern Pacific RainforestNorthern Pacific Rainforest, sub-region and priority type: Pacific and Yukon Region
 

References