Ключевые слова: adult, america, animal, animals, ardea, avian, background, beak, bird, black, blue, cinerea, city, crowned, europe, fauna, feather, feathers, fishing, great, green, grey, heron, hunting, lake, large, looking, marsh, natural, nature, neck, night, observation, ocean, ornithology, plumage, pond, posted, reflect, reflection, river, sky, standing, tricolored, water, wetland, white, wild, wildlife, yellow,