But he can say that this is a “credible” report of a wolf pack and the first-ever one in recent history. It was followed by the discovery of an elk carcass in the same area. It was nearly picked clean — something wolves are known for — and surrounded by what were likely wolf pawprints.

“All those things put together led our officers, our wildlife managers to the conclusion that the most logical explanation is that there is a group of wolves living in northwest Colorado,” Porras said.

Wolves used to live in Colorado until humans killed and forced the last ones out sometime in the 1940s. Since then, there have been some credible but isolated “lone wolf” sightings, but that was it, until now.

“There are several states surrounding or near Colorado that have wolf populations,” Porras said. “Probably, that’s where they’re coming from.”

Soon, Colorado could be the next state to approve wolf-reintroduction. Just this week, the state announced that the question will be on the November ballot.

While Colorado Parks and Wildlife has said it will be neutral on the measure, it has opposed reintroduction efforts in the past.