Yellowstone's bison are icons of one of America's greatest wildlife conservation rescue stories. Many also view them as sacred. Descended from a small number of animals that miraculously escaped the near extinction of the species, they have a strange dubious status. They are the only animals in Yellowstone that are not allowed to naturally migrate out of America's national park because of intolerance from Montana's livestock industry. This photograph was taken at Rose Creek in the Lamar Valley. Image courtesy Neal Herbert/NPS