In this epic showdown, a devoted dog proves its loyalty, standing its ground against a menacing mountain lion.

Mule deer herds are declining across the West for many reasons. But three states — Utah, Wyoming and Nevada — want to both pin the blame on mountain lions and “resolve” the issue by using cruel traps ...

The Birmingham Zoo is the new home of an orphaned cougar from Montana that arrived in the South by FedEx. The Birmingham Zoo ...

The Birmingham Zoo plans to open its new Cougar Crossing habitat later in March. The habitat's first resident, an orphaned ...

While big cats on a plane may sound like the setup to a bad action movie, the idea became reality when the Birmingham Zoo was mailed a mountain lion last month ...

The Phoenix Zoo lost its beloved mountain lion, Sierra, who was humanely euthanized this week after dealing with advanced ...

The zoo said zookeepers and veterinary staff made the "difficult decision" to put down mountain lion Sierra earlier this week ...

Zoo staff made the difficult choice to euthanize one of the zoo’s two female mountain lions, Sierra, earlier in the week.

The cubs — named Fern, Thistle, and Spruce — are just 3 months old. Zoo gives much-anticipated health update on 'thin' ...

The Phoenix Zoo lost one of its longtime residents this week. Sierra, a mountain lion, was humanely euthanized due to ...

Visiting Rocky Mountain National Park is an incredible experience, but it comes with responsibilities. Respect for wildlife is paramount. A recent incident involving a tourist and a mother bear with ...