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

PHOENIX — A new tiger exhibit is now open for the public’s viewing at the Wildlife World Zoo in Litchfield Park. The new ...

The Phoenix Zoo will break ground this week on a new veterinary medical center. The 27,000-square-foot building will provide ...

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 ...