The grizzly bear is one of the most iconic species in Yellowstone National Park. When the U.S. Fish and Wildlife Service took steps to remove bears near the park from the endangered species list last year and began to allow limited hunting in the area, animal rights activists were outraged.

Now, a federal judge’s ruling puts Yellowstone’s grizzlies back on the endangered species list. A decision issued by Montana Judge Dana Christensen Monday stated that in delisting Yellowstone grizzlies from the endangered list, the Fish and Wildlife Service had acted “arbitrarily and capriciously,” disregarding the long-term health of grizzly bear populations.

Grizzly bears in Yellowstone were first added to the endangered species list in 1975. At