Endangered Species

Española tortoises are reared for five years before being released on the Galápagos' Española Island.

Diego, the 100-Year-Old Tortoise Who Fathered 900 Babies, Returns to the Wild

The breeding program brought the Española tortoise population back from the brink

After seeing their numbers slashed due to overhunting in the 20th century, North Atlantic right whales still face plenty of threats, including ship strikes, habitat degradation and pollution. A mother and her calf are seen in this aerial image from 2005.

Can Scientists Protect North Atlantic Right Whales by Counting Them From Space?

A new collaboration between the New England Aquarium and the engineering firm Draper seeks to use satellite sonar and radar data to create a global watch

On December 24, 2019, the Potter Park Zoo in Michigan welcomed a healthy male black rhino calf.

Baby Black Rhino Born at Michigan Zoo on Christmas Eve

The birth of the yet-to-be-named male calf marks a milestone for conservationists trying to save the critically endangered species

An infant mountain gorilla from the Katwe group in Bwindi Impenetrable National Park, Uganda.

Endangered Mountain Gorilla Populations Are Growing

But the animals remain threatened with extinction

Dead mussels along the Clinch River.

Scientists Don't Know Why Freshwater Mussels Are Dying Across North America

Mussel species are dying en mass in rivers across the Pacific Northwest, Midwest and South—likely from unidentified pathogens

An image from Birds of America by John James Audubon depicting the Great Auk.

Humans May Be Solely to Blame for the Great Auk’s Extinction

A new study suggests that the flightless birds were not declining due to environmental changes when humans began to hunt them in large numbers

Iman died of cancer on November 23 at a sanctuary in Borneo.

Sumatran Rhinos Are Now Extinct in Malaysia

Iman, a 25-year-old female and the last Sumatran rhino in the country, died on Saturday

City noise can throw off a bat's ability to use echolocation.

Noise Pollution Impacts a Wide Range of Species, Study Finds

From tiny insects to large marine mammals, animals are affected by noise in ways that might threaten their survival

Researchers Discover Secret Breeding Ground of World's Most Endangered Crocodile

Over 100 recently-hatched gharials were found deep in Nepal's Bardia National Park

A humpback whale basks in sunlight at the ocean's surface in Atlantic Ocean off the coast of the Dominican Republic.

South Atlantic Humpback Whales Have Rebounded From the Brink of Extinction

A new study estimates that the group’s population has grown from 440 individuals in 1958 to nearly 25,000 today

Illegally caught belugas in a pool in Srednyaya Bay near the city of Nakhodka in Russia's Far East.

Russia Frees Last Belugas From Notorious ‘Whale Jail’

Dozens of orcas and belugas had been kept in small sea pens, reportedly awaiting sale to China

These Beautiful Blue Turkey-Like Birds Have Tiny Brains and Huge Social Networks

A new study finds that vulturine guineafowl live in complex societies previously found in primates, elephants and dolphins

A steppe eagle with an SMS tracker attached.

Text Messages Sent by Roaming Eagles Bankrupt Scientific Study

A steppe eagle named Min spent months out of range before reappearing in Iran and sending hundreds of expensive SMS texts

The sea urchins are causing havoc.

Voracious Purple Sea Urchins Are Ravaging Kelp Forests on the West Coast

The trouble started in 2013, when sea stars, an urchin predator, began to die off

Why Did Thousands of Rubber Bands Show Up on an Uninhabited Cornish Island?

Nesting gulls have likely been trying to feed the bands found in nearby flower fields to their chicks for decades

North America's Rarest Warbler Comes Off the Endangered List

Habitat restoration and invasive species trapping have helped Kirtland's recover in its central Michigan home

Previously, researchers believed giraffes' spots grew darker with age

Color of Giraffes’ Spots Reflects Social Status, Not Age

New research suggests male giraffes with darker coloring are more solitary, dominant than lighter-hued counterparts

Once Thought to Be Extinct, This Lucky Clover Has Recovered Enough to Come Off the Endangered List

Running Buffalo Clover, which once spread on trampled ground left by bison, has made a comeback in the Midwest and Appalachians

Najin (left) and Fatu, the last two northern white rhinos, on the day before their eggs were harvested.

Eggs Successfully Collected from the Last Two Northern White Rhinos

Advances in fertility science will hopefully allow researchers to implant embryos of the species into surrogate southern white rhinos

Potential explanations for the disorder include infectious disease, rat poison, toxic algae and nutritional deficiencies.

Florida Authorities Investigate a Disorder Affecting Panthers' Ability to Walk

The crippling condition appears to hamper the big cats’ back leg coordination

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