Sold Individually Bison, symbolic animals of the Great Plains and have also been called buffaloes. By any name, they are massive beasts and the heaviest land animals in North America. Bison stand some 5 to 6.5 feet tall at the shoulder, and can tip the scales at over a ton. Despite their massive size, bison are quick on their feet. When the need arises they can run at speeds up to 40 miles an hour. That’s a lot of animal coming at you surprisingly fast.