"The dusky grouse (Dendragapus obscurus) is a species of forest-dwelling grouse native to the Rocky Mountains in North America. It is closely related to the sooty grouse (Dendragapus fuliginosus), and the two were previously considered a single species, the blue grouse."@en . . . . . "LC" . . . "IUCN3.1" . . . "Dusky grouse"@en . .