A tour group watched a pack of wolves unsuccessfully try to take down a bison in Yellowstone National Park this past weekend.

A mild winter means fewer rotting big game carcasses scattered about for Wyoming grizzlies to feast on this spring. Wolves ...

These Yellowstone interior wolves, considered bison-killing specialists, often use groomed park roads to get around in winter, at times walking right by snowmobilers buzzing down the road on their way ...