Dictionary.com
definitions

spruce grouse

noun
  1. a grouse, Canachites canadensis, of coniferous forests of northern North America, that feeds on evergreen buds and needles.

Origin of spruce grouse

An Americanism dating back to 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for spruce grouse

spruce grouse

noun
  1. a game bird, Dendragapus canadensis, occurring in Canadian coniferous forests
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