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| genus = Dendragapus
| species = obscurus
| authority = ([[Thomas Say|Say]],
| range_map = Dendragapus obscurus map.svg
}}
The '''dusky grouse''' ('''''Dendragapus obscurus''''') is a species of [[forest]]-dwelling [[grouse]] native to the [[Rocky Mountains]] in [[North America]].<ref name=hbw>del Hoyo, J., Elliott, A., & Sargatal, J., eds. (1994). ''Handbook of the Birds of the World'' 2: 401-402. Lynx Edicions, Barcelona {{ISBN|84-87334-15-6}}.</ref><ref name=Sibley>{{cite book | author=Sibley, D. | author-link=David Allen Sibley | title=[[The Sibley Guide to Birds]] | publisher=Knopf | year=2000 | isbn=0-679-45122-6 | page=[https://archive.org/details/sibleyguidetobir00sibl_0/page/143 143] }}</ref> It is closely related to the [[sooty grouse]] (''Dendragapus fuliginosus''), and the two were previously considered a single species, the [[Dendragapus|blue grouse]].<ref name="hbw"/><ref name="Sibley"/><ref name="AOU">{{cite journal | last=Banks | first=R. C. | last2=Cicero |first2= C. |last3=Dunn |first3=J. L. |last4=Kratter |first4=A. W. |last5=Rasmussen |first5=P. C. |last6=Remsen |first6=J. V. Jr. |last7=Rising |first7=J. D. |last8=Stotz |first8=D. F. | title=Forty-seventh Supplement to the American Ornithologists' Union Check-list of North American Birds | journal=The Auk | year=2006 | volume=123 | issue=3 | pages= 926–936 | url = http://www.aou.org/checklist/suppl/AOU_checklist_suppl_47.pdf | access-date = 2007-09-16 | doi=10.1642/0004-8038(2006)123[926:FSTTAO]2.0.CO;2|doi-access=free }}</ref>
==Description==
Adults have a long square tail, gray at the end. Adult males are mainly dark with a purplish [[throat sac|throat air sac]] surrounded by white, and a yellow to red wattle over the eye during [[display (zoology)|display]]. Adult females are mottled brown with dark brown and white marks on the underparts.<ref name=Sibley/>
Males are larger than females, with a male mean body mass of 1.21 kg (2.67 lbs.) compared to a mean 0.91 kg (2.01 lbs.) in females.<ref>{{Cite book |last=Dunning, Jr. |first=John B. |title=CRC Handbook of Avian Body Masses |publisher=CRC Press |year=2008 |isbn=978-1-4200-6444-5 |edition=2nd |pages=71}}</ref>
==Distribution and habitat==
== Taxonomy ==
The dusky grouse has four recognized subspecies:<ref>Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Pheasants, partridges, francolins". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 13 October 2021.</ref>
* ''D. o. obscurus'' <small>([[Thomas Say|Say]], 1822)</small>
* ''D. o. oreinus'' <small>([[William H. Behle|Behle]] & Selander, 1951)</small>
* ''D. o. pallidus'' <small>([[Harry Swarth|Swarth]], 1931)</small>
* ''D. o. richardsonii'' <small>([[David Douglas (botanist)|Douglas]], 1829)</small>
==Migration==
They are permanent residents but move short distances by foot and short flights to denser forest areas in winter, with the odd habit of moving to higher altitudes in winter.<ref name=hbw/>
==Diet==
==Breeding==
Males sing with deep hoots on their territory and make short flapping flights to attract females. Females leave the male's territory after mating.
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{{Taxonbar|from=Q543345}}
[[Category:Grouse|dusky grouse]]
[[Category:Dendragapus|dusky grouse]]
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