Wyoming ranchers are being paid to let elk winter on their land, a strategy conservationists hope will reduce the spread of ...

As an always-lethal disease spreads on elk feedgrounds, pilot projects are underway to find more low-elevation habitat for ...

Not even park rangers are off limits for angry bull elk.

Yellowstone National Park has recently seen the effects of wolves being brought back into its borders. The animals have ...

Wolves culled the elk. Fewer elk means more aspens can grow. More beavers are attracted to the trees. It's called a trophic ...

Editor’s Note: This story accompanies the May 2016 issue of National Geographic magazine, devoted entirely to America’s first national park. Find more at natgeo ...

In Yellowstone, grizzly bears and wolves live pretty close together, and their territories often overlap. As you can imagine, ...

About 50 Yellowstone National Park visitors got the wildlife viewing opportunity of a lifetime in late January. Perched above Hayden Valley, they watched as the Wapiti Lake wolf pack pursued a ...

Dave Hallac stood in his office at the Yellowstone Center for Resources, the park body charged with science and resource management, in a rambling old clapboard building amid the formidable stone ...