This winter saw the most wolves from Yellowstone National Park killed in about a century. That's because states neighboring the park changed hunting rules in an effort to reduce the animals' numbers.

Claims that wolves have rescued Yellowstone National Park's aspen trees through a "trophic cascade" oversimplify a complex story.

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 ...

Yellowstone National Park is home to several wild animals. Tourists are allowed to spot them only from a distance to ensure their safety and the animals' protection. The national park goes above and ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Scientific research has long assumed gray wolves are non-migratory during springtime, staying ...