Four bull bison that migrated out of Yellowstone National Park were killed by state livestock agents Wednesday - the first to be killed by the government this year under a contentious policy meant to prevent the spread of disease to livestock.
Many of Yellowstone's bison carry brucellosis, which can cause pregnant animals to miscarry. There have been no recorded transmissions of the disease in the wild from bison to cattle.
Three of the bison killed Tuesday were captured north of West Yellowstone and sent to slaughter, said Department of Livestock Executive Officer Christian Mackay.
The animals were just outside an area recently designated as year-round habitat for bull bison. Mackay said livestock agents made several attempts to haze the bulls back into the park before capturing the animals.
The fourth bull was shot at the edge of a guest ranch near the South Fork of the Madison River. Mackay said that animal had been mingling with livestock in recent days.
But Bar N Ranch manager Gayle Gavagan said the bison was more than a mile from the nearest cattle herd when it was shot.
She called the shooting "unfortunate" and said it had caused a stir among the ranch's three dozen guests.
"The buffalo are a national symbol," she said. "The cattle ranchers feel that they could be in peril, which I can appreciate. But I don't really know