Mammals

With a baby in tow, a gray-headed flying fox uses her large eyes to navigate, rather than relying on echolocation as other bat species do. 

Why Australians Are Growing to Appreciate These Giant, Threatened Bats

Once seen as a menace, the gray-headed flying fox brings new life after recent devastating wildfires

Grazer, also known as 128 Grazer, stands in a river in September 2023, after bulking up for hibernation.

Meet Grazer, the Winner of Fat Bear Week 2023

A fiercely aggressive mother and a skilled angler, the massive brown bear has been crowned this year's champion in the annual online popularity contest

With their mating season approaching, two male Nubian ibex fight for supremacy on a cliffside. The photograph won the Animals in their Environment category.

See 12 Winning Images From the Wildlife Photographer of the Year Contest

The stunning entries showcase the behaviors of ancient and elusive species, from horseshoe crabs to tapirs and orcas—as well as the threats they face

Because of their size, cats have relatively short vocal cords—so how are they able to produce such low-frequency sounds when purring?

How Do Cats Purr? Scientists May Now Have an Answer

Domestic cats produce low-frequency vocalizations when purring, an unusual ability for their small size

Mammal taxidermy under ultraviolet light: (a) polar bear, (b) southern marsupial mole, (c) greater bilby, (d) mountain zebra, (e) bare-nosed wombat, (f) six-banded armadillo, (g) orange leaf-nosed bat, (h) quenda, (i) leopard, (j) Asian palm civet.

More Mammals Can Glow in the Dark Than Previously Thought

A new study found that 125 different mammal species are fluorescent under ultraviolet light, suggesting the property is widespread

A silky anteater, small enough to sit comfortably in your palm, rests in the canopy of a mangrove forest in Brazil’s Parnaíba Delta.

This Fluffy Little Anteater May Be a New Species

The animals eke out a living in a pocket of mangroves on Brazil’s Atlantic coast

A killer whale in the Salish Sea is observed harassing a porpoise.

Why Do Orcas Keep Harassing Porpoises?

An endangered group of killer whales in the Pacific Northwest has been toying with porpoises for decades—and new research offers some possible explanations

Adult dugong swimming and feeding in the shallow water of the Red Sea. 

Dugong Populations Are Declining in the Great Barrier Reef, Study Finds

Destruction of seagrass habitats and "indiscriminate" gillnet fishing have both contributed to the marine mammals' dropping numbers, scientists say

A mother bear and two cubs in Katmai National Park and Preserve in Alaska.

Before Fat Bear Week, Don’t Forget the Corpulent Cubs Competing in Fat Bear Junior

The offspring of Katmai National Park’s famous brown bears will face off in a bracket all their own

Warming spurred by Earth's next supercontinent could lead to widespread desert conditions, a new modeling study suggests. Pictured is the Tengger Desert in Inner Mongolia, an autonomous region of China.

Earth's Next Supercontinent Could Wipe Out Mammals in 250 Million Years

Termed “Pangea Ultima,” the predicted future landmass might be extremely hot, plagued by volcanoes and largely inhospitable, per a new modeling study

A Tasmanian tiger at the Hobart Zoo in Tasmania. The last known living Tasmanian tiger died at the zoo in 1936.

Scientists Collect First RNA From an Extinct Tasmanian Tiger

No other RNA has ever been extracted from an extinct species, so the breakthrough opens doors to understanding the biology of long-gone organisms

Sea lions breed and give birth at Point La Jolla in San Diego.

San Diego Closes Popular Beach for Seven Years to Protect Sea Lions

Visitors have been getting too close to the marine mammals—taking selfies and even harassing them—as they rear their pups

Why can't we stop anthropomorphizing our animal friends and foes?

Are Wild Animals Really Just Like Us?

A summer of news reports about orca, otter and bird “attacks” has the public wondering if trying to understand animal behavior in human terms is misguided

The female whale was found stranded in January on a beach near Palm Coast, Florida.

How an Orca Skeleton Made Its Way From Florida to the Smithsonian

Washed up in a rare stranding event, the newly collected specimen will offer rich exploration for researchers

Moose numbers have plummeted in Minnesota.

What's Killing Minnesota's Moose? Studies Reveal Sites of Deadly Brainworm Transmission

Carried by deer and spread by snails and slugs, a lethal parasite is infecting the large ungulates, which have recently declined dramatically

Cows with the slick gene have sleek, short hair that helps keep them cool.

Farmers Are Breeding Cows to Withstand Heat Waves

A gene that occurs naturally in some cow breeds may be the key to helping cattle thrive as temperatures rise because of climate change

The rare all-brown giraffe was born in July.

See the Rare Spotless Giraffe Born at a Tennessee Zoo

The baby might be the only all-brown giraffe on the planet, as the last one on record was born in 1972

Though she appeared to be in good health just days earlier, Lolita died of a suspected renal condition.

Lolita the Orca Dies After More Than 50 Years in Captivity

Several groups were working to remove the 7,000-pound creature from the Miami Seaquarium and return her to the ocean at the time of her death

A wolf spotted in the Sequoia National Forest

New Pack of Endangered Gray Wolves Discovered in California

The pack, which consists of a mother and her four offspring, is now the state’s southernmost wolf group

The remains likely belong to a Qinling panda rather than a Sichuan panda. Pictured: Qi Zai, a Qinling panda born in captivity

Fully Intact Giant Panda Skeleton Discovered in Chinese Emperor's 2,000-Year-Old Tomb

Archaeologists previously found a panda skull in a nearby Han burial, but its torso was missing

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