Ключевые слова: africa, america, anatidae, animal, avian, beak, bird, black, brown, california, captive, close, close up, dendrocygna, dendrocygna viduata, detail, duck, ecosystem, environment, faced, fauna, feather, fowl, grass, group, lake, living, nature, neck, no people, one, ornithology, outdoor, park, plumage, pond, portrait, south, south america, swim, viduata, water, water bird, waterfowl, whistling, white, whitefaced, whitefaced whistling duck, wild, wildlife,