A weekend outing to the Northern California woods took a horrific turn for two brothers when a mountain lion attacked them, killing one.

On Saturday, the El Dorado Sheriff's Office responded to a mountain lion attack that left one dead and one injured.

Officials said it was the first fatal attack by a cougar in California in 20 years.

SeaQuest says the top priority of its shopping mall aquariums is animal health and safety, but some advocates, parents and former employees are raising red flags.

Sabrina Peckham, 41, was found by in the mouth of a 13-foot alligator. The alligator was later euthanized.

A woman was found dead after an apparent bear encounter near Yellowstone National Park, according to Montana Fish, Wildlife & Parks.

13-year-old Gabriel Klimis was bitten on the hip by am eight-foot alligator in Winter Springs, Florida, and he fought it off with a stick and called 911 himself.

Wildlife officials are trying to determine what led to the unprovoked daylight attack by the adult black bear, which killed 66-year-old Steven Jackson.

Hungry bears in California are emerging from hibernation due to record snow melt and wildlife officials are now expecting an increased number of bear encounters.

An Oklahoma woman's ear was ripped off by an escaped pet monkey she found on her porch, police said.

Police in Ohio responded to a scary situation after a zebra attacked its owner.

The bear was shot and killed, zoo officials said.

A bear at Jacksonville Zoo and Gardens in Florida was shot and killed after it escaped its enclosure and injured a zookeeper Wednesday evening, zoo officials said.

The incident occurred in the same county where a tiger attacked a man at a zoo.

A woman suffered "significant" injuries after being charged by a black bear near her home in Washington state, authorities said.

Two alligators were removed from the golf course after the attack, the sheriff's office said.

This was the first fatal attack in the state by an alligator since May 2020.

The 3-year-old and her mother both sustained superficial wounds on their heads.

Police are investigating a suspected deadly alligator attack in Largo, Florida.

According to deputies, an employee stepped into the enclosure where he was unauthorized to be while a caretaker was feeding two tigers.

The tiger attacked a man who put his hand into the exhibit.

A worker was hospitalized with serious injuries after he entered an unauthorized area of a Florida zoo and was attacked by a tiger, authorities said.

Criminal charges are on the table for a zoo maintenance worker who entered an unauthorized area and was attacked by a tiger. Police were forced to kill the endangered tiger to save him.

A member of the cleaning service at Naples Zoo was transported to the hospital with injuries after entering an unauthorized area and being bitten by a tiger. The animal was shot and did not survive.

An investigation is underway in Naples, Florida, where a tiger attacked a maintenance worker at a zoo. Police say he was attacked after sticking his arm into the tiger’s enclosure.

Charlie Buhl, 12, is speaking out after a crocodile pulled him off a staircase near a dock while on vacation with his family at Club Med in Cancun this summer.

During a child’s birthday party over the weekend, an alligator bit the handler at a zoo outside of Salt Lake City. A guest helped free the woman and others cared for her until paramedics arrived.

An alligator was caught on camera clamping its jaws down on an unidentified handler’s hand and dragging her into the water at the Scales and Tails petting zoo in Utah.

Kiana Hummel, 18, is recovering at a hospital after she was attacked by a crocodile while vacationing at the Marriott Puerto Vallarta Resort & Spa on Mexico’s Pacific coast.

She’s recovering and is now sharing her story. ABC News’ Megan Tevrizian has more.

A person was rescued by helicopter and taken to the airport after reportedly being bitten by a bear searching for food at a Mystic Lake, Montana, campsite.

A 16-year-old is recovering after she was attacked by a black bear while sleeping in a hammock in the middle of the night in Great Smoky Mountains National Park.

Animal experts offer advice after a teen was seen fending off a bear with her bare hands to save her dogs in her backyard.

A hiker suffered "significant injuries" after encountering two grizzly bears at Yellowstone National Park.

A Colorado woman out walking her dogs died of a suspected bear attack, officials said.

An employee of Ohio's Columbus Zoo and Aquarium has been released from the hospital after being attacked by a cheetah on Thursday.

Somer Stevens, 18, remembers screaming for help after a tiger named Eeyore “pulled” her arm “into his mouth” while working at an animal sanctuary in Tennessee.

A 72-year-old man in England has been killed by a herd of charging cows making him the second such victim to die in this way in just a 10-day period in the country.

A mountain lion may have killed three animals at the San Francisco Zoo.

Kristyn Hayden Ortega said she would “really like to hug my kiddos with two hands” as she recovers from serious injuries in the attack.

Two Bengal tigers wounded Patty Perry, the founder of the Wildlife Environmental Conservation, during a special event. She sustained lacerations and puncture wounds.

A black bear died after severely injuring a hunter whose companion had shot it in the North Carolina woods.

The woman was taken to a Memorial Health in Savannah, Georgia, for treatment.

A two year old boy was killed by a leopard in South Africa's world famous Kruger National Park.

Nicole Tillman was airlifted to a hospital after the attack in Brevard County.

Jonathan Kraft, the director and founder of Keepers of the Wild, was moving the 11-year-old tiger to a safer area during a heavy rainstorm and was attacked by the normally docile animal.

The man was flown to a Las Vegas hospital for treatment.

Topeka Zoo officials said Kristyn Hayden-Ortega was inside the tiger exhibit Saturday morning when she was mauled by the 275-pound cat.

Zookeeper Kristyn Hayden-Ortega is recovering from the attack at a local hospital.

A Kansas zookeeper who was attacked by a Sumatran tiger at the Topeka Zoo over the weekend is on the mend, officials said Monday.