Ключевые слова: acuta, anas, anas acuta, animal, avian, beak, bill, bird, birds, black, blue, britain, brown, duck, feathers, female, flight, fly, foraging, graceful, grass, green, habitat, hunting, lake, male, migratory, nature, north, northern, northern pintail, ornithology, pair, peaceful, pintail, plumage, pond, portrait, reflection, species, swim, two, uk, water, waterfowl, wetland, wild, wildfowl, wildlife, wings,