Ключевые слова: alster, anatidae, animal, anser, avian, background, beak, beautiful, bill, bird, birds, black, brick, brown, bushes, domestic, duck, eye, farm, feather, feathered, geese, golden gate park, goose, grass, gray, green, grey, head, lake, landscape, mammal, marsh, nature, orange, ornithology, outdoor, park, plumage, river, san francisco, standing, trees, water, waterfowl, white, wild, wildlife, wing,