Ключевые слова: animal, background, beak, beautiful, beauty, bird, bird sleep, bird sleeping, birds, birdwatching, brown, closeup, colorful, cute, duck, duck sleep, duck sleeping, ducklings, ducks, fauna, feather, feathers, grass, green, head, lake, mallard, natural, nature, ornithology, outdoor, park, pond, relax, rest, resting, river, sleep, sleeping, spring, summer, tired, water, waterfowl, white, wild, wildlife, wing, wings,