The Phoenix Zoo and Reid Park Zoo in Tucson are both dealing with the loss of longtime residents. The Phoenix Zoo lost its beloved mountain lion, Sierra, who was humanely euthanized this week ...

The Phoenix Zoo will debut its state-of-the-art Big Cats of Arizona: A Bridge to Arizona Wilderness habitat in early April, a new exhibit designed to highlight Arizona's native big cats—mountain lions ...

A rendering of what the Phoenix Zoo's new veterinary medical center will look like when it is complete. The Phoenix Zoo will break ground this week on a new veterinary medical center. The ...