Ключевые слова: animal, bird, birding, birdwatching, black, black grouse, blackgame, bog, call, cock, display, displaying, early, endangered, environment, eyebrow, fauna, feather, finland, forest, game, gorgeous, grouse, lek, lekking, lyrurus tetrix, male, marshland, mating, mating season, morning, nature, norway, ornithology, photographer, poland, portrait, russia, species, spring, springtime, sunrise, sweden, tetrao, tetrix, wetland, wild, wilderness, wildlife,