Nearly 25 years after wolves were reintroduced, the predators have helped parts of the park bounce back but haven't completely restored Yellowstone.

See our letters to the editor policy. This article appeared in the print edition of the magazine with the headline Flooding could breathe life into Yellowstone ecosystem.

Sharing a meal with a greedy tablemate makes for fraught relations, especially when there are claws and fangs involved. For wolves and grizzly bears in Yellowstone National Park, competition over ...

A new study calculates the long-term effects of reintroducing wolves to Yellowstone National Park in the 1990s, which ultimately helped willow trees that feed wildlife in stream habitats.

Yellowstone’s ecological transformation through the reintroduction of wolves has become a case study for how to correct out-of-balance ecosystems. But new research challenges that notion.

An eponymic, impending example of this danger lies in America’s iconic Yellowstone, home to all species known at the time of the Louisiana Purchase and the explorations of Lewis and Clark.

A new documentary series about Yellowstone displays the dynamic, dramatic and exciting ecosystem that thrives within the park’s gates.

In another example of how the return of a top predator can have far-reaching ecological effects, researchers have found that the reintroduction of the gray wolf to Yellowstone National Park has ...

When the federal government set aside the Greater Yellowstone Ecosystem (GYE) as a national park in 1872, about three to four hundred wolves were present, preying mostly upon large hooved ...

The researchers began studying the interaction of wolves with other parts of the ecosystem somewhat indirectly. “Back in 1997, I became aware that the aspen trees in Yellowstone were declining ...

"In North America, in the Greater Yellowstone Ecosystem, for example, 11 per cent of local bird species—including some songbirds—feed on puma kills." ...