On their first migration to their summer range in southeastern Yellowstone, three-week-old calves of the Cody elk herd follow their mothers up a 4,600-foot slope. A few hours earlier they swam the ...

For years, Yellowstone National Park was home to two distinct bison herds, each with its own breeding patterns. But new research reveals a big change: these once-separate herds have now merged ...

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

Yellowstone is home to some of North America's most iconic wildlife, including the Big Five. Here's what you need to know ...

Frank Bison in Yellowstone National Park spent over 100 years as two genetically distinct herds. But now they're roaming as one interbreeding population, a new study suggests. Herds of wild bison ...

These herds have been traveling these routes ... with brucellosis infections passed to domestic livestock by elk and bison in the Yellowstone region. The vision of PERC is to help the ranch ...