Mammals

A hippo crosses a rural road near Doradal, Colombia. Experts say that left unchecked the hippo population could grow to 1,400 by 2040.

Pablo Escobar’s Abandoned Hippos Are Wreaking Havoc in the Colombian Jungle

Decades ago, the drug baron smuggled the beasts into South America for his private menagerie. They’ve been multiplying ever since. Now officials are taking extreme measures to counter the problem

The two Hudson Bay polar bear groups are often considered indicators of how the 17 other polar bear subpopulations will fare in the future.

Time Is Running Out for the Hudson Bay Polar Bears

The southern and western subpopulations are on track to disappear as sea ice becomes too thin amid rising global temperatures

The white bison calf and its mother were spotted in Yellowstone National Park.

Rare White Bison Calf Born at Yellowstone National Park

A photographer spotted the calf on June 4. White buffalo are sacred to some Native American tribes, and the birth has been called a "blessing and a warning"

Newly examined fossils suggest monotremes—egg-laying mammals—were once much more abundant in Australia than they are today.

Meet the 'Echidnapus,' an Extinct Creature That Resembles Both the Echidna and Platypus of Today

The species is among three newly identified monotremes, or egg-laying mammals, discovered from fossils in Australia that are shedding light on the odd animals' evolution

An endangered Przewalski's horse is released into the Altyn Dala "Golden Steppe" in central Kazakhstan.

Endangered Wild Horses Return to Kazakhstan for the First Time in at Least 200 Years

The international effort, led by the Prague Zoo, released seven Przewalski’s horses to their native steppe habitat in central Asia

Elephants at Serengeti National Park in Tanzania, on May 3, 2024. Elephants use low, rumbling vocalizations to call to others and while caring for their young.

African Elephants May Call Each Other by Name

In a new study, a computer model was able to identify the recipient of an elephant's call more than a quarter of the time, which scientists say is significantly greater than chance

Wombats are stocky marsupials that can weigh up to 85 pounds.

Don't Call Wombats Heroes, but Their Burrows Do Provide Food, Water and Shelter for Other Animals

During Australia’s devastating bushfires in 2019 and 2020, misinformation spread about wombats welcoming animals into their underground homes—but a new study finds a kernel of truth in the viral story

One of the new benthic landers is lowered into the Gulf of Mexico via a system of winches and safety lines. Once released, the autonomous platform sinks at a carefully calculated rate until it lands on the seafloor.

These Innovative Landers Will Examine Coral Reefs in the Gulf of Mexico

Scientists plan to use what they learn to help restore communities harmed by the Deepwater Horizon oil spill

This fossilized Buronius tooth is roughly a third of an inch long.

Do These Fossilized Teeth Belong to the World’s Smallest Great Ape?

Researchers say two teeth and a kneecap belong to a previously unknown species that lived in what is now Germany

The researchers used drone footage and tracking devices to analyze the behavior of 11 orcas in the northern Pacific Ocean.

Between Dives, Orcas Take Only a Single Breath

A new study finds the black-and-white marine mammals tend to make shorter, shallower dives compared to humpback and blue whales, making orcas the "sprinters" of the ocean

Wedge-tailed shearwaters surprised scientists by showing up after rats were eradicated on Tromelin Island—a place, in the Indian Ocean, where the seabirds hadn’t been documented breeding before.

After Rats Were Eradicated From This Small Island, Seabirds Thrived

Tromelin Island became a safe place for birds once the invasive mammals were eliminated

Marc Händel, an archaeologist with the Austrian Academy of Sciences, excavates rib bones in the wine cellar.

Austrian Man Discovers Hundreds of Mammoth Bones While Renovating His Wine Cellar

Owner Andreas Pernerstorfer thought he'd found a piece of wood, but then he remembered something his grandfather had said about finding teeth in the cellar decades ago

Rangers clear deceased birds from Staple Island in England, where avian flu had a devastating effect on a seabird colony.

Four Important Questions About Bird Flu, Answered

The virus has killed tens of millions of birds and infected hundreds of species of animals, including dairy cattle in the United States. Here’s what you should know about it

A subpopulation of orcas in the Strait of Gibraltar (not pictured) have interacted with roughly 700 boats since 2020, causing five of the vessels to sink.

Orcas Sink 50-Foot Yacht Off the Coast of Morocco

The vessel's two passengers were evacuated onto an oil tanker in the Strait of Gibraltar. The incident marks the fifth vessel the mammals have sunk in recent years

A mother Siphonops annulatus with newborn babies.

Inside the Wild Ways Many Creatures Make Milk

Mammals aren’t the only animals that provide nutritious secretions for their young

Male belugas were more likely than females to change the shape of their melons, or foreheads.

Belugas May Communicate by Changing the Shape of Their Squishy Foreheads

Scientists documented five different melon shapes among the marine mammals living in captivity: push, flat, lift, shake and press

In the late 1960s, Bob Paine described the Pisaster sea star as a “keystone species” in Pacific Northwest tide pools. The concept has since taken on a life of its own.

Has the Term 'Keystone Species' Lost Its Meaning?

More than 50 years after Bob Paine’s experiment with starfish, hundreds of species have been pronounced “keystones” in their ecosystems

Sperm whales communicate by making clicks.

Scientists Discover a 'Phonetic Alphabet' Used by Sperm Whales, Moving One Step Closer to Decoding Their Chatter

Researchers used artificial intelligence to spot patterns in recordings of the marine mammals' vocalizations, uncovering the "building blocks of whale language"

A bat clings to the roof of an abandoned cellar—an unlikely but vital habitat type for Europe’s bats.

How a Fantastical Labyrinth Became a Crucial Habitat for Europe’s Bats

After scientists documented the flying mammals in the Piusa Sand Caves, dug by miners a century ago, conservationists strove to protect the vital habitat

More than 1,000 sea lions gathered at San Francisco's Pier 39 last week, marking the largest congregation of the marine mammals at the city's Fisherman's Wharf in about 15 years.

More Than 1,000 Sea Lions Gather at San Francisco's Pier 39, the Largest Group in 15 Years

The pinnipeds came to the area to feed on anchovies and herring as they prepare for breeding season

Page 1 of 30