species

Native cutthroat are the park's most ecologically important fish because it is a food source for grizzly bears, birds of prey and other wildlife.

The bears were determined to be a threatened species in 1975.

Park fisheries supervisor Todd Koel says park officials want to keep the invasive species from spreading to the park and to the Columbia River Basin.

The U.S. Fish and Wildlife Service proposed in 2011 that gray wolves are no longer a threatened species in Wyoming.