• 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
2018	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	not a migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	15,500,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	18000000 mature individuals	poor	suspected	2006
Population trend	stable	-	estimated	-
Generation length	3 years	-	-	-

Population justification: The global population is suspected to number 18,000,000 mature individuals (Partners in Flight 2019).

Trend justification: Christmas Bird Count data shows a long-term decline in U.S.A, with the rate of decline potentially decreasing over recent years, whereas in Canada the long-term trend is stable (Meehan et al. 2018). Data from the North American Breeding Bird Survey shows a stable population over the last ten years (Pardieck et al. 2018). Therefore, overall, the population trend is tentatively assessed here as stable.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Canada	extant	native	yes
St Pierre and Miquelon (to France)	extant	introduced	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		Occasional altitudinal limits

Purpose	Scale
Food - human	subsistence, national
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Ruffed Grouse Bonasa umbellus. Downloaded from https://datazone.birdlife.org/species/factsheet/ruffed-grouse-bonasa-umbellus on 24/11/2024.
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 24/11/2024.