Ключевые слова: animal, bird, blue, bulgaria, cygnus, danube, dunav, elegant, europe, feather, flight, flock, flying, group, kej, light, natural, nature, outdoor, reflection, river, rousse, russe tutrakan, scenic, sight, summer, sun, sunlight, sunray, sunset, swan, swans, tent, tourism, transparent, travel, view, water, white, wild, wildlife, wings,