Bison are the iconic image of the Great Plains and the old West. They are massive, shaggy beasts and the heaviest land animals in North America. Despite their hefty size, bison are quick on their feet. When the need arises they can run at speeds of up to 40 miles (65 Kilo meters) an hour. Their curved, sharp horns can grow to be 2 feet (61 centi meters) long.

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American bison