Adult trumpeter swans (Cygnus buccinator) on frozen Swan Lake in Yellowstone National Park, Wyoming, USA.

3 animals 3 adult animal adult animals animal theme animal themes animals bird birds cygnus buccinator freezing frozen horizontal horizontals in the wild lake lakes landscape national park national parks no one no people no person no body no one nobody np nps swan swan lake swans sea bird sea birds seabird seabirds sgoa small group of animals standing stand trumpeter swan three animals trumpeter swans wyoming water wild wild animal wild animals wildlife yellowstone national park yellowstone