The prairie is home to the evolved bison. Bison are modern day animals with woolly coats that help them to stay warm. In the science fiction movie, After Earth, herds of bison roamed across the planet Earth. a group of bison is called a herd and they run and walk in the western prairies and forests of europe and north america. All bison eat plants, grass, and roots and they protect their herds from predators. In the movie, bison have long and strong horns and a hump on their backs like a Camel. They grunt and burp and snarl and groan and moan in the entire america and europe continents. the bison are found in songs and videos and books and movies.