The smallest gray wolf subspecies in North America, the Mexican gray wolf is also one of the rarest and most imperiled mammals on the continent. The U.S. Fish and Wildlife Service (and its predecessor ...

In Yellowstone’s winter wilderness, Stan Tekiela tracks elusive wolves, navigating deep snow and freezing temperatures for a rare, unforgettable encounter.

The agency on Thursday released new photos of the January reintroductions ... January’s release was the second of between three to five wolf release seasons.