Ключевые слова: adult, anas, anas platyrhynchos, animal, avian, beak, beautiful, bill, bird, cold, duck, environment, fauna, feather, feathers, fowl, freeze, freshwater, frost, frozen, full length, green, ice, icy, lake, male, mallard, nature, one, orange, ornithology, outdoor, outside, platyrhynchos, pond, quack, scene, seasonal, stand, standing, tranquil, water, waterbird, waterfowl, wetland, wild, wildfowl, wildlife, winter,