Ключевые слова: adult, beach, beautiful, big, bird, brood, cygnet, cygnus, down, europe, feather, flight, flock, fly, fresh, king, lake, majestic, mature, mute, nature, neck, new, norge, norway, oslo, puberty, river, scandinavian, sea, seaboard, seashore, shore, shoreline, sit, svane, swan, swim, swiming, virus, white, wild, wildlife, wing, young, youthful,