Ключевые слова: active, america, anas, animal, aquatic, beautiful, bird, birds, black, blue, brown, circling, colors, couple, duck, ducks, fast, female, flight, flock, flying, green, group, head, hunt, lake, lot, male, mallard, many, natural, nature, necked, north, platyrhynchos, ring, ringnecked, river, sky, soaring, speed, spring, water, waterfowl, white, wild, wildlife, winter,