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

Male black grouse (Lyrurus tetrix) landing 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

Heather moors, grouse habitat, Yorkshire Dales National Park, Yorkshire, England, United Kingdom, Europe

Adult male spruce (Franklin's) grouse (Falcipennis canadensis) near Brooks River, Katmai National Park, Alaska, United States of America

Western capercaillie (Tetrao urogallus), during the courtship, Berchtesgadener Land, Bavaria, Germany, Europe

Western capercaillie (Tetrao urogallus), during courtship, calling, animal portrait, Berchtesgadener Land, Bavaria, Germany, Europe

Willow ptarmigan (Lagopus lagopus), summer plumage, Varanger, Norway, Europe

Ptarmigan (Lagopus) in summer dress, Lofoten, Nordland, Norway, Europe