a dull gray grouse, Dendragapus obscurus, of western North America, the male of which has a yellow or orange comb.
Origin of blue grouse
An Americanism dating back to 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for blue grouse
a grouse, Dendragapus obscurus, of W North America, having a bluish-grey plumage with a black tail
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012