Birds are one of the animal species on Earth. They have wings that enable them to fly and live in nests of trees or other places. During the 2012 apocalypse, birds are seen in Yellowstone National Park when they flew off, after sensing the upcoming eruption of the Yellowstone Caldera, which frightened them. They were seen by Jackson Curtis, Lilly Curtis and Charlie Frost before the eruption began. It is presumed that some bird species are on the Arks that survived the apocalypse while remaining others were either killed or perished in the apocalypse.