• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2021	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2007	Least Concern
2004	Not Recognised
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Migratory status	altitudinal migrant	Forest dependency	medium
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	3,390,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	200000 mature individuals	poor	estimated	2019
Population trend	stable	-	suspected	-
Generation length	4.6 years	-	-	-

Population justification: The global population is estimated to number 200,000 mature individuals (Partners in Flight 2020).

Trend justification: Based on data from the North American Breeding Bird Survey, over the past three generations (13.8 years) the species has undergone a non-significant annual increase of 1.48% (4.25% decrease to 6.26% increase) (Pardieck et al. 2018). This corresponds with Partners in Flight's assessment of the species, which implies the species's trend is stable or increasing slowly (Partners in Flight 2020). Data from Audubon's Christmas Bird Count however suggest a long-term decline of the population (Meehan et al. 2018). Given the uncertainty over whether the species is increasing, it is precautionarily assessed here as stable.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Canada	extant	native	yes
USA	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Boreal	suitable	resident
Forest	Temperate	suitable	resident
Altitude	0 - 3600 m	Occasional altitudinal limits

Purpose	Scale
Food - human	subsistence, national
Pets/display animals, horticulture	international
Sport hunting/specimen collecting	subsistence, national

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Recommended citation
BirdLife International (2024) Species factsheet: Dusky Grouse Dendragapus obscurus. Downloaded from https://datazone.birdlife.org/species/factsheet/dusky-grouse-dendragapus-obscurus on 19/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 19/12/2024.