Millions of these massive creatures, known so well for their enormous heads and long shaggy brown coats, historically ranged across the continent from the Appalachians to the Rockies, and from the Gulf Coast to Alaska. By 1889, due in large part to market hunting, numbers were reduced to just over 1,000. Today bison numbers have rebounded, mostly in places like national parks and wildlife conservation areas.
Today, there are estimated to be roughly 500,000 bison living across North America.
Yellowstone National Park, perhaps best known for its geothermal features like Old Faithful and Mammoth Hot Springs, is one place where these animals have always done well. The Park preserves the most important bison herd in the United States because it is the only place where bison have lived continuously since prehistoric times. The herd here, estimated in 2015 to be at 4,900, is the oldest and largest public bison herd in the United States.