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

From wild ponies in Virginia to bison in Yellowstone, here are seven wildlife-rich destinations—and tips on how to be a ...

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

Yellowstone is the only place in the United States where bison have lived continuously since the prehistoric age. Scientists ...

More than 100 years after bison from other regions were introduced to the park, the two genetically distinct herds have ...