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 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, ...

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.

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 ...

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

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

COLORADO SPRINGS, Colo. (KXRM) — The Cheyenne Mountain Zoo is giving individuals the opportunity of a lifetime, and all they have to do is give them a guess on how much a moose’s antlers weigh.

Get ready for a wild time at Hertfordshire Zoo this week. Visitors can get up close to incredible animals, from majestic big cats and soaring birds of prey to fascinating reptiles and adorable ...

(COLORADO SPRINGS) — Cheyenne Mountain Zoo (CMZoo) is giving individuals the opportunity of a lifetime, and all they have to do is give them a guess on how much Akta’s antlers weigh.

In celebration of resident moose Atka shedding his antlers, the Cheyenne Mountain Zoo wants to hear how much you think the antlers weigh. Like many male moose, Atka (a.k.a "the Prince of Rocky ...