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