American Bison:
The only continuously wild bison herd in the United States resides within Yellowstone National Park. Numbering between 3,000 and 3,500, this herd is descended from a remnant population of 23 individual mountain bison that survived the mass slaughter of the 1800s by hiding out in the Pelican Valley of Yellowstone Park. In 1902, a captive herd of 21 Plains bison were introduced to the Lamar Valley and managed as livestock until the 1960s, when a policy of natural regulation was adopted by the park.
MP3: Ween - Mountains And Buffalos