Wolverines are, in fact, real creatures that like cold weather. They build their dens in deep piles of snow.

But these days, the misunderstood and rarely considered wolverine is running out of places to go. Many parts of their current range — from Alaska to Wyoming — are becoming warmer and less snowy because of climate change. And even as suitable habitats disappear, human development is cutting into what little remains.

A plan is underway to reintroduce the creature into the Southern Rocky Mountains in Colorado, where wolverines once thrived and have since disappeared.