Tetrao is a genus of birds in the grouse subfamily. The genus name is derived from the Latin name of a gamebird, probably the black grouse

Tetrao tetrixBlack grouseEurope (Swiss-Italian-French Alps specially) from Great Britain (but not Ireland) through Scandinavia and Estonia into Russia

Tetrao mlokosiewicziCaucasian grousesoutheastern Europe

Tetrao urogallusWestern capercaillieEurope to western RussiaTetrao urogalloidesBlack-billed capercaillieeastern Russia as well as parts of northern Mongolia and China