The United States in the early 1900s rounded up the last remaining wild American bison after commercial hunting reduced the species to only a few hundred animals; today, hundreds of thousands once again roam protected lands

Millions of American bison once roamed the plains of North America over many millennia, shaping a rich ecosystem. The massive herds ranged from what is now Canada to Mexico.

Raccontata datimesofindia.indiatimes.com