The Alliance for the Wild Rockies, is taking Montana state and federal officials to court over the use of helicopters to move bison in Yellowstone National Park. They claim that the use of helicopters harasses the grizzly bears in the area. They have video of a grizzly running in terror from one of the low flying copters.
The Montana Department of Livestock are responsible for the hazing of the bison. They try to keep the bison out of the forest where cattle graze, to keep the cattle free of brucellosis. The Department usually work on horseback to move the bison, but there are some areas they can not get through privately owned property, which makes it necessary to use helicopters.
Wednesday's suit accuses the Forest Service of violating the National Forest Management Act and National Environmental Policy Act by harming and harassing grizzlies in the Yellowstone Grizzly Recovery Zone. From The Rapid City Journal .