Invasive mussels pose threat to Yellowstone National Park

Because of the park's location, the introduction of invasive mussels could put the currently mussel-free waters in Wyoming, Montana, and Idaho at risk.

Whale that vanished from Atlantic over 200 years ago spotted off Massachusetts: 'Shouldn't exist'

Scientists from the New England Aquarium (NEA) in Boston were flying off the coast of Nantucket on Friday when they saw a leviathan that has been extinct for over 200 years: a gray whale.

Las Vegas’ Bellagio helps rescue yellow-billed loon from its fountain

The Bellagio in Las Vegas had to pause its fountain show, as it worked with officials to rescue a yellow-billed loon who “found comfort" in the water.

White shark breaks records with historic journey from South Carolina to Mexico

A white shark, LeeBeth, recently made a historic journey from South Carolina to Mexico, marking the furthest westward tracking of a white shark in the Gulf of Mexico.

March Napness: Contest underway to find the sleepiest sanctuary bear

You’ve heard of March Madness and Fat Bear Week, but are you ready for March Napness? As hibernating season comes to an end, the search is on for the sleepiest sanctuary bear.

A look at NYC's most memorable animal celebrities

Flaco is the latest in a long line of non-human celebrities that have made New York City their home over the years.

Joro spiders known for giant webs poised to invade more US cities, study warns

Joro spiders have been found in new research to be even more "urban tolerant" than previously believed, setting these creatures up to invade even more U.S. cities.

Flaco the owl's cause of death revealed

New York City's beloved celebrity owl Flaco died from an “acute traumatic injury," zoologists from the Bronx Zoo said a day after he reportedly flew into a building, with further testing planned to determine if the Eurasian eagle-owl may have been sick.

Two giant pandas are being sent to San Diego Zoo from China

China is planning to send a new pair of giant pandas to the San Diego Zoo this year, quelling fears after nearly all the iconic bears on loan to U.S. zoos were sent home as bilateral relations began to sour.

70 coins pulled from white alligator's stomach in Nebraska

Last week, Thibodaux, a 36-year-old leucistic alligator at the Omaha's Henry Doorly Zoo and Aquarium, underwent a procedure to remove a stomach full of coins. Leucism is a condition that causes partial loss of all types of pigmentation.

Watch: Donkeys interrupt meteorologist’s report, stealing the spotlight

Ohio meteorologist Matt Willoughby's broadcast took an unexpected turn when a herd of donkeys wandered into the frame, leaving him momentarily stunned.

Man killed by lion after entering enclosure at zoo: 'The animal attacked'

A zoo guest who decided to climb a wall to enter a lion enclosure to apparently take a selfie was mauled to death by the animal Thursday, according to reports.