Ключевые слова: animal, beak, bird, birdwatching, black, black grouse, bog, britain, british, call, cock, cold, display, early, environment, fauna, feather, forest, game, gorgeous, grouse, head, hunt, lek, male, marshland, mating, mating season, morning, nature, ornithology, playing, plumage, portrait, red, season, snow, spring, springtime, sunrise, tetrao tetrix, tetrix, wetland, wild, wilderness, wildlife,