Yellowstone starts bison cull as animals migrate to Montana

Twenty-seven of the bison captured over the past week were sent to the Confederated Salish and Kootenai Tribes for slaughter and will provide food for tribal members, Yellowstone bison coordinator Tim Reid said Thursday.

Six of the captured bison, also known as buffalo, will be held in quarantine for future relocation to tribal lands and four calves were released, Reid said.

Separately, two bison have been shot by hunters so far this winter, said Greg Lemon with Montana Fish, Wildlife and Parks.

Officials plan to end shipments of bison to slaughter by the end of March to avoid capturing animals in late-term pregnancy, Reid said. That means there’s only a window of about five weeks to reach the culling objectives, which in past years have often been missed.

Bison routinely leave Yellowstone and head north into Montana each winter, raising concerns that the animals could spread brucellosis, a bacterial disease that can cause cows to abort their calves. Brucellosis can spread to people but is rare in humans in the U.S.

Elk have spread the disease to livestock, but there are no documented cases of bison spreading brucellosis to livestock in the wild. State livestock officials on Tuesday announced an infection in a cow from a herd in Gallatin County, the 12th herd affected by brucellosis since 2010.