State officials say they're worried about bison passing on disease to cattle outside the park—but wildlife managers say it's never happened before.

an expansion of Yellowstone’s bison herd violates federal laws and puts the burden of protecting livestock from brucellosis, a reproductive disease, on Montanans. “The National Park Service has ...

One might think that the National Park Service and the State of Montana, the two entities charged with stewardship of ...

Montana Governor Greg Gianforte and two agencies have raised a lawsuit to challenge the Yellowstone National Park's way of managing its bison herd, arguing that it violates federal laws.

The lawsuit, filed by the Alliance for the Wild Rockies and Council on Fish & Wildlife, comes less than three weeks after the ...

The state of Montana is suing the iconic Yellowstone National Park over its plan to increase the number of bison in and ...

The National Park Service’s plan to increase bison herd sizes has drawn criticism from state officials concerned about disease transmission. Montana’s governor and state agencies filed a ...

Montana is suing Yellowstone National Park over a plan to increase the number of bison in and around the park ... directs wildlife managers to aim for a herd of 3,500-6,000 animals, a modest ...

A long-simmering battle between Yellowstone National Park officials and the Gianforte administration in Montana came to a head on Tuesday with state officials suing the park in federal court for ...