Tourists witnessed an extraordinary scene in Yellowstone National Park on Friday as a German Shepherd leaped from the back of ...

A dog was seen jumping out of a car window and chasing a wolf in Yellowstone Friday. A tour guide captured photographs of the ...

A German shepherd showed its predator instincts Friday, leaping from a vehicle and briefly chasing a wolf in Yellowstone ...

Jonathan Newton/Getty A 400 lb. grizzly bear was euthanized by Yellowstone National Park staff last week after it overturned dumpsters and searched for food in developed areas of the park.

The Greater Yellowstone Ecosystem, with Yellowstone National Park at its core, has been identified by the government agency as a "recovery zone" for grizzly populations.