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 ...

A mountain lion has killed a young man and badly injured his ... Officers fired their rifles to scare off the cougar so that they could recover the body. They administered first aid to the younger ...

The El Dorado County Sheriff's Office has yet to identify the two brothers who were attacked by the mountain lion. The 21-year-old who was killed and ... was dragged off by the mountain lion.

Investigators are baffled by the case of somebody killing a mountain lion in Montana, and then cutting off and taking the ...

A pet owner in Chino Valley asked for help after a puppy was attacked by a mountain lion, according to a GoFundMe account. It happened on Jan. 31, according to a GoFundMe post organized by Christi ...

The Arizona Game and Fish Commission finalized new five-year ... The agency failed to consider issues such as hound hunting, spring bear hunting, and lowering female mountain lion kill numbers to ...