The Phoenix Zoo lost its beloved mountain lion, Sierra, who was humanely euthanized this week after dealing with advanced renal failure. The Reid Park Zoo had to humanely euthanize their African lion, ...

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

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

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. She came to the zoo 17 years ago as an orphaned cub ...

Meet Phoenix, the bald eagle. Dickerson Park Zoo zookeeper Kyanne Kilger shares the backstory of one of the zoo's oldest animals.

Days after Arizona fans used expletives while referencing the BYU Cougars' faith in a chant, BYU head coach Kevin Young gave credit to ASU.

The city of Maricopa is bringing the annual Copa Cultural Night Market back for its fourth year in a wild way.

Swinging onto a banner with a spinoff of Taylor Swift lyrics, this Memphis Zoo ape is feeling 22. See the adorable ...