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.

While Pirate Yakuza thoroughly takes advantage of its Hawaiian setting, there are still plenty of reminders of the series' ...

TUCSON, Ariz. — Reid Park Zoo is set to celebrate its 60th anniversary with a special event this weekend. On March 1 and 2, ...