Yellowstone Bison (wild buffalo a la Americans) in deep trouble

Yellowstone bison, an icon of the American West, is facing a new threat. Animals, which wander on to public grazing lands used by cattle ranchers are being butchered. The thin veil of justification used for this atrocity is that the buffalo present a disease threat to domesticated cattle
50 million buffalo once roamed the Great Plains. Millions were slaughtered and at the end of the 19th century only 23 wild bison remained. The survivors, who found refuge in Yellowstone National Park, are the ancestors of America's only remaining wild herd.
Environmentalists have appealed to the US Government for more humane, science-based programs to manage Yellowstone buffalo.