Ключевые слова: adult, animal, aquatic, avian, beak, bird, brown, coloured, day, drake, duck, ecology, environment, fauna, feather, feathers, feet, fowl, green, lake, male, mallard, mottled, natural, nature, one, outdoor, outdoors, outside, pattern, plumage, pond, ripples, river, rock, sea, single, spotted, standing, stone, water, waterbird, waterfowl, wave, wetland, wild, wildlife, young,