From CPR.org in Colorado:
In June, on a remote two-track road in Northwest Colorado, a truck driven by a state biologist stirred up an animal. From behind the wheel, the biologist and her husband watched an adult gray wolf cross the dirt before it scampered over a hill.
What happened next could be a landmark in Colorado’s natural history. A few minutes after the adult disappeared, the biologist reported a dark gray puppy followed the same path. The sighting could mean a group of grey wolves isn’t just living in Colorado for the first time since humans eradicated the species in the 1940s.