Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

Male black grouse (Lyrurus tetrix) fighting on snow covered field, Finland

Male black grouse (Lyrurus tetrix) landing on snow covered field, Finland

Black grouse (Lyrurus tetrix), lekking, Cairngorms, Scotland, United Kingdom, Europe

Black grouse (Lyrurus tetrix), fighting, territorial behaviour, Kuusamo, Finland, Europe

Black Grouse or Blackgame (Lyrurus tetrix), courting cock

Black grouse, also blackgame or blackcock (Lyrurus tetrix) courting male, Hedmark, Norway, Europe

Black grouse, also blackgame or blackcock (Lyrurus tetrix) courting male, Hedmark, Norway, Europe

Black grouse, also blackgame or blackcock (Lyrurus tetrix), male taking flight, Hedmark, Norway, Europe

Black grouse, also blackgame or blackcock (Lyrurus tetrix) courting males in fighting stance, Hedmark, Norway, Europe

Black grouse, also blackgame or blackcock (Lyrurus tetrix) courting male, Hedmark, Norway, Europe

Black grouse (Lyrurus tetrix, Tetrao tetrix), courting in a snow-covered moor, Sweden, Scandinavia, Europe

Black Grouse (Tetrao tetrix), male displaying, Wallis, Swiss Alps, Switzerland, Europe

Male Black Grouse displaying at lek in flight, Finland

Mating of Black Grouse on snow, Alps Switzerland

Black grouse (Lyrurus tetrix), single male on snow, Finland

Black grouse (Lyrurus tetrix) fighting in lek in a snowy bog

Black grouse (Lyrurus tetrix) fighting in lek in a snowy bog

Black Grouse;Lyrurus tetrix) mating on snow in the Vaud Pre-Alps, Switzerland.

Black grouse (Lyrurus tetrix) fights at dawn in a peat bog, Finland

Male Black Grouse displaying at lek, Finland

Black grouse ( Lyrurus tetrix ) male displaying on snow, Prealps, Switzerland .

Black Grouse (Lyrurus tetrix) male displaying on a bog, Finland

Black grouse (Lyrurus tetrix) fighting in lek in a snowy bog

A Black Grouse (Lyrurus tetrix) displays during the Lek in Norway.

Black grouse (Lyrurus tetrix) displaying in lek in a snowy bog

Male black grouse on a branch in autumn, Finland

Black grouse (Lyrurus tetrix) portrait

Two Black Grouse (Lyrurus tetrix) go head to head during the Lek in Norway.