capercaillie
noun
cap·er·cail·lie ˌka-pər-ˈkā-lē 
-ˈkāl-yē
variants or capercailzie
ˌka-pər-ˈkāl-zē
plural capercaillie or capercailzies also capercaillies or capercailzie
: a very large European grouse (Tetrao urogallus) of hilly coniferous woodlands
Example Sentences
Recent Examples on the Web Now, with the body of a western capercaillie as evidence, authorities in southwestern Germany are trying to determine what happened. 
BostonGlobe.com, 12 Aug. 2019 With luck, spot an elusive capercaillie, an endemic Scottish crossbill, or a magnificent golden eagle. National Geographic, 12 June 2019 Concealed within these forests are Tengalman’s owl, capercaillie and black woodpecker. Smithsonian, 15 June 2018
BostonGlobe.com, 12 Aug. 2019 With luck, spot an elusive capercaillie, an endemic Scottish crossbill, or a magnificent golden eagle. National Geographic, 12 June 2019 Concealed within these forests are Tengalman’s owl, capercaillie and black woodpecker. Smithsonian, 15 June 2018 Word History
Etymology
Scottish Gaelic capalcoille, literally, horse of the woods
First Known Use
1536, in the meaning defined above