"If you’re lucky, you can spot a gray wolf in Yellowstone National Park. But a century ago, you’d have been hard pressed to find any there. Poisonings and unregulated hunting obliterated nearly all of these majestic canines from Canada to Mexico, their original home range.
Then the rewilding began.
Since their reintroduction to Yellowstone and Idaho in the 1990s, gray wolves have done so well that they’re reclaiming other parts of the northern Rockies."