Tundra swans, whistling swans, tundra swan, swan, swans, Cygnus columbianus, swan, waterfowl, bird, birds, group, flock, winter, wildlife, horizontal, wetland, pond, lake, Lower Klamath, National Wildlife Refuge, CA, OR, OREGON, action, motion, flight, taking off, fauna, photo, photos, photograph, photographs, image, images, stock, of, agency