Ключевые слова: animal, beak, bird, birdwatching, black, blackgame, bog, call, cock, cold, czech, dark, environment, estonia, fauna, fen, finland, forest, game, gorgeous, grass, grouse, lek, lekking, male, marshland, mating, meadow, morning, nature, nice, norway, ornithology, playing, plumage, portrait, red, rime, season, slovkaia, spring, springtime, sunrise, sweden, tetrao, tetrix, wetland, wild, wildlife,