Ключевые слова: animal, animals, aquatic, aquatic bird, aquatic birds, avifauna, background, beak, beautiful, bird, birds, chlidonias, chlidonias hybridus, color, color image, colour, daytime, europe, fauna, feather, feathers, flight, fly, flying, greece, horizontal, hybridus, nature, one, ornithology, outdoor, outdoors, seabird, seabirds, sky, tern, terns, whiskered, white, wild, wildlife, wing, wings, zoology,