A tourist guide at Yellowstone filmed a wolf chasing after an elk for about 3.5 to 4 miles.

It’s an animal-eat-animal world out there, especially in Yellowstone National Park. There are almost 70 different mammal ...

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Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...

Footage shows part of a wolf-versus-elk pursuit that also has bison taking cover.