Ключевые слова: animal, animals, aquatic, background, beak, beautiful, beauty, billboards, biology, bird, color, dark, duck, duckling, ecology, evil, family, feather, flight, fluffy, grass, green, head, lake, mallard, mother, natural, nature, ornithology, outside, park, platyrhynchos, pond, reflection, river, swim, water, waterfowl, wet, white, wild, wildlife, wings, winter,