French: Tétras sombre German: Douglasiengebirgshuhn Spanish: Gallo oscuro
Other common names:
Blue Grouse (when lumped with D. fuliginosus)
“Defile Creek”, Colorado, USA
Subspecies and Distribution
D. o. richardsonii
(Douglas, 1829) – W Canada from SE Yukon and SW Northwest Territories S through British Columbia and W Alberta to N USA (N Idaho and perhaps NW Montana).
D. o. pallidus
Swarth, 1931 – SW Canada (SC British Columbia) S through E Washington to NE Oregon, most of Idaho, W Montana and N & W Wyoming.
D. o. obscurus
(Say, 1823) – Rocky Mts from C Wyoming S through Utah and Colorado to N & E Arizona and W New Mexico. May formerly have ranged E to W South Dakota, although more likely introduced there.
D. o. oreinus
Behle & Selander, 1951 – NE Nevada (Snake Range, Ruby Mts and Toiyabe Range), S Idaho and W Utah (Deep Creek Mts).
Male 47–57 cm, c. 1245 g; female 44–48 cm, c. 850 g. Relatively large grouse; male mostly grey or slate-coloured, lacking black breast of ... read more
Male song consists of series of five far-carrying hooting notes, usually delivered from on or... read more
Wide range of habitats in mountain zones, with greater preference for shrub-steppe and grassland... read more
Food and feeding
Winter diet consists almost entirely (c. 90–99%) of needles, but including buds, twigs and cones, of firs (Pseudotsuga,... read more
Lays late Apr–Jun, mostly from mid May. Promiscuous; males dispersed, on territories that are occupied year after year, although... read more
Altitudinal shifts between breeding and wintering grounds reported for most areas; in winter... read more
Status and conservation
Not globally threatened (Least Concern). Global population c. 3,000,000 mature individuals. Still occupies most of original very large range, with some contractions due to... read more
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