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

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

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 after ...

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

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 state-of-the-art space is dedicated to showcasing and caring for some of Arizona’s most elusive native predators.

Phoenix Zoo's mountain lion, Sierra, dies After 17 long years at the Phoenix Zoo, Sierra the mountain lion was humanely euthanized after experiencing renal failure, the zoo said on Feb. 27.

According to the zoo, more than $5.3 million was raised to build a new habitat for mountain lions and jaguars. Here's what ...

The Phoenix Zoo is a great place to enjoy nature without your little ones dying of boredom. There are four trails that wind through the numerous habitats populated by more than 3,000 animals ...

PHOENIX (AZFamily) — The Phoenix Zoo had to make a tough announcement this week. Zoo staff made the difficult choice to euthanize one of the zoo’s two female mountain lions, Sierra ...