Ключевые слова: adult, anatidae, animal, avian, beak, bill, bird, birdwatching, blue, brown, clean, colorful, crested, duck, ecology, environmental, europe, fauna, feather, floating, fowl, head, lake, male, nature, netta rufina, ornithology, park, peaceful, pet, plumage, pochard, pond, protection, red, redcrested, redcrested pochard, reflection, river, smooth, species, spring, summer, swimming, tranquil, transparent, water, waterfowl, wild, wildlife,