The Plains Bison, also known as the American bison, is a large mammal native to North America. They are characterized by their massive heads, humped shoulders, and thick fur, which helps them survive in cold climates. Plains bison typically roam the grasslands and prairies, where they graze on grasses and other vegetation. Plains bison play a crucial role in their ecosystem by helping to maintain the health of grasslands. Their grazing habits promote plant diversity and provide habitats for other species. Once nearly extinct due to overhunting, conservation efforts have helped their populations recover in recent years.