Near the intersection of U.S. Highways 297 and 191, around eight miles north of West Yellowstone, Mont., hazing to urge the bison back into the park kicks into overdrive. The buffalo are driven back into Yellowstone National Park each spring on the premise that the animals could infect domestic cattle with brucellosis. Tribune photo by Gib Mathers
Roving buffalo hazed back into Yellowstone National Park
An orbiting helicopter and riders atop ATVs and on horseback provided quite the circus Thursday as they hazed buffalo that had sought greener pastures outside Yellowstone National Park to graze and birth calves on public and private land outside West Yellowstone, Mont.
The annual spring hazing of bison wintering in the Hebgen Lake area has been happening since 2000 under the Interagency Bison Management Plan. The plan calls for driving the bison back into Yellowstone National Park, less than 10 miles to the east, before May 15 to reduce the chance that they will transmit brucellosis to cattle. The disease causes pregnant females to abort their calves.