Zoology

At least 138 howler monkeys have been found dead in the Mexican state of Tabasco since May 16.

Mexico's Howler Monkeys Are Dying, 'Falling Out of the Trees,' Amid Scorching Heat Wave

Veterinarians and volunteers are trying to save the threatened primates by hoisting buckets of water and food into trees, as well as providing medical care

Elephants use different greetings depending on whether the other animal is looking at them.

How Do Elephants Say Hello? Reunions Lead to Ear Flapping, Rumbling and Trunk Swinging in Greeting

New research explores how African savannah elephants use vocalizations, gestures and secretions when they meet up with companions

Ocelots have been listed as federally endangered in the U.S. since 1972.

Endangered Ocelots May Be Expanding Their Range in Texas

DNA testing of an ocelot killed in 2021 raises the possibility that the creatures may be roaming outside their established South Texas territory, which is currently their only stronghold in the country

Hibernating common eastern bumblebee queens survived for a week while submerged underwater in a lab.

Hibernating Bumblebee Queens Can Survive Underwater for Up to a Week, Study Finds

Researchers discovered the insects’ unexpected superpower during an accidental laboratory snafu

Captured at the zoo's in-house Paul Harter Veterinary Medical Center, the CT scan reassured veterinarians that the chick was doing just fine.

Peek Inside a California Condor Egg Just Before It Hatched, With This CT Scan of the Baby Bird

Last month, the San Diego Zoo Wildlife Alliance welcomed its 250th California condor chick in its breeding program, and the CT scan helped determine the bird was well-positioned for hatching

The babies were born on March 21, just six months after their parents were first introduced.

Adorable but Deadly Fluff Balls, Better Known as Pygmy Slow Lorises, Born at the Smithsonian's National Zoo

The two babies are part of an endangered species whose unbearable cuteness has made them a target for wildlife traffickers

Wide-ranging anecdotal reports and studies suggest many animals respond to a total solar eclipse, whether by showing anxiety, performing nighttime behaviors or doing something unexpected.

How Do Animals React to a Total Solar Eclipse? Scientists Document Strange and Surprising Behaviors

Nature enthusiasts work with researchers to figure out how creatures respond to the celestial phenomenon

Mei Xiang and Tian Tian are two of the giant pandas who lived at the Smithsonian's National Zoo and Conservation Biology Institute in recent years. They were returned to China in November 2023.

More Giant Pandas Are Coming to the U.S. in a New Loan From China

China plans to send a male and a female panda to the San Diego Zoo as early as this summer, and negotiations are underway for pandas' possible return to the National Zoo in Washington, D.C.

In a study of great apes' playful antics, chimpanzees seemed to enjoy slapping adults, especially those that were dozing off.

Great Apes Love to Tease, Poke and Pester, Suggesting the Urge to Annoy Is Millions of Years Old

The desire to get a rise out of others is a 13-million-year-old trait humans and great apes share with a common ancestor, new research suggests

African gray parrots are highly intelligent birds that can learn to closely mimic human voices.

These Parrots Won't Stop Swearing. Will They Learn to Behave—or Corrupt the Entire Flock?

A British zoo hopes the good manners of a larger group will rub off on the eight misbehaving birds

Gaia is still getting comfortable in her new environment.

See the 'Adorable'—and Deadly—Black-Footed Cat at a Utah Zoo

Eight-month-old Gaia is part of a breeding program for her vulnerable species, which is considered the "world's deadliest cat"

Cats can fetch—but they prefer to be in control of the playtime.

Like Dogs, Some Cats Will Play Fetch—but Mostly on Their Own Terms

Many felines appear to pick up the playful behavior spontaneously, without any explicit training, a survey of cat owners finds

The leucistic baby gator is happy and healthy, veterinarians say.

Rare White Alligator Born at Florida Wildlife Park

The baby gator, which doesn't have a name yet, was born with leucism, a condition that affects pigmentation

After peanut butter failed to attract the giant rats, researchers turned to sesame oil.

See the First-Ever Photographs of a Rare Giant Rat That Lives Only on One Pacific Island

The elusive and critically endangered Vangunu giant rats are at least twice the size of common rats

Researchers studied African penguins in the colony at Zoomarine Italia in Rome.

African Penguins Tell Each Other Apart by Their Polka Dot Patterns

New research suggests the birds may find their mates in crowded colonies by looking at their chest plumage

Researchers have isolated phages from zoo-dwelling lemurs, giraffes, binturongs, Visayan pigs and Guinea baboons that might help fight diabetic foot ulcers.

Viruses Found in Animal Poop May One Day Treat Diabetic Foot Ulcers, Scientists Say

Known as bacteriophages, the specialized viruses could hijack and kill drug-resistant bacteria

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

A zoo employee weighs a meerkat during the annual weigh-in.

London Zoo Weighs All 14,000 of Its Animals, 'From the Tallest Giraffe to the Tiniest Tadpole'

The annual measurements help zookeepers track each animal's health over time

The clouded leopard kitten, born last month at the Oklahoma City Zoo, has now been transferred to the Nashville Zoo to be hand-reared and eventually paired with a mate.

'Rare' Clouded Leopard Kitten Born at the Oklahoma City Zoo

Keepers hope the young male will have his own "little cloudies" one day, helping maintain the vulnerable species' captive population

The snake's new enclosure is specially designed to help the creature avoid hurting itself.

A Rare Two-Headed Snake Is Back on Exhibit at a Texas Zoo

Pancho and Lefty, as the western rat snake is known, has now healed from an injury it suffered more than two years ago

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