Ключевые слова: action, animal, bird, birding, birds, birdwatching, black, black cock, black grouse, blackgame, bog, breeding, call, cock, early, eyebrow, fauna, feather, forest, game, grouse, hunt, lek, lekking, lyrurus, male, mating, mating call, mating season, morning, nature, ornithology, playing, portrait, red, russia, season, singing, species, specific, spring, springtime, sunrise, tetrao, tetrao tetrix, tetrix, wetland, wild, wilderness, wildlife,