"The Collosal" by Warmwind. The American Bison or Buffalo's temperament is unpredictable. At the time bison ran wild, they were considered more dangerous than the grizzly bear. After the great slaughter of American Bison during the 1800s, the bison remaining alive in North America declined to as low as 541. A handful of ranchers gathered remnants of the existing herds to save the species from extinction.