The largest land mammal in North America is the American bison, also known as the buffalo. These massive animals can weigh up to 2,000 pounds and stand about six feet tall at the shoulder. Bison are known for their thick, shaggy fur, large heads, and distinctively curved horns. Historically, they roamed the grasslands of the continent in vast herds. Today, American bison are found in national parks and reserves, where conservation efforts have helped to restore their populations after they faced near extinction in the 19th century.