Ключевые слова: animal, avian, beautiful, bird, birdwatching, blue, chen caerulescens, fauna, feathers, flight, flock, fly, formation, fowl, geese, graceful, group, hunt, migrate, migrating, migration, migratory, nature, outdoors, pennsylvania, rural, sky, snow geese, spring, waterfowl, white, wild, wildlife, wings, winter,