Ключевые слова: animal, arctic, avian, beautiful, bird, birdwatching, blue, columbianus, cygnus, flight, flock, fly, fowl, graceful, group, migrant, migrate, migration, migratory, nature, outdoors, protected, sky, swan, trumpeter, tundra, waterbird, waterfowl, whistling, white, wild, wildfowl, wildlife, wings, winter,