Ключевые слова: biodiversity, biology, bird, blue, clouds, cloudy, environment, europe, fauna, flora, frozen, grass, gravel pit, growing, habitat, haff rhyme, high, hiking, icy, jump, lake, landscape, luxembourg, moselle, natural, nature, observation, observe, plants, point, pond, recover, recreation, reed, relax, reserve, road, sea, sky, snow, travel, trees, vacation, valley, watching, water, wetland, winter,