A herd of bison cows and calves in the Lamar Valley in Yellowstone National Park. (Photo by Diane Renkin/National Parks Service) The Fort Peck Assiniboine and Sioux Tribes, along with four other ...

The Fort Peck Assiniboine and Sioux Tribes, along with four other groups, have asked a federal court judge to let them intervene in a lawsuit that the State of Montana filed against Yellowstone ...