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Ecology

The white-headed duck is “one of the true eccentrics of the waterfowl world because almost everything about it seems unusual,” says waterfowl expert Nicky Petkov.

Spain’s White-Headed Ducks Have a Signature Color Right in the Name. And That Isn’t Even Their Most Remarkable Hue

The first thing you’re likely to notice is the blue bill. But beyond appearances, the duck has an exciting story to tell about conservation and recovery

In loud conditions, a tokay gecko adjusts its call, which is typically used to find a mate or defend territory.

Reptiles Make a Surprising Amount of Noise. Here’s What Those Sounds Might Mean, From Pops to Hoots to Bellows

Scientists are realizing that turtles, lizards and crocodilians communicate vocally more than they once thought

An artist's interpretation of what Chosha praecursor might have looked like while splitting its time between water and land 324 million years ago in what is now Texas.

This Ancient Insect Had 24 Legs—and Could Help Explain How the Ancestors of Modern-Day Bugs Took Over the Land

A previously undescribed critter that lived 324 million years ago appears to have been a transitional species that lived between land and sea. It could help researchers fill an 80-million-year gap in the fossil record of how crustaceans evolved into insects

A photo of Solenostomus snuffleupagus taken in 2003

Meet the Newly Discovered Fuzzy Fish Species Named After Mr. Snuffleupagus From ‘Sesame Street’

The ghost pipefish’s scruffy appearance probably helps it look like floating algae, allowing it to blend in with its environment. Researchers had been on the hunt for this strange creature for years after first spotting one more than two decades ago

Researchers observed bearded capuchins in Brazil eating birds (shown here), lizards, rodents, opossums, snakes and other small vertebrates.

When Fruit Is Scarce, These Monkeys Hunt Animals. The Behavior May Offer Clues About the Origins of Humans’ Meat-Eating Habits

The bearded capuchins of northeastern Brazil typically eat plant-based foods, but they turn to small vertebrates when those sources are limited. Our ancestors may have done the same, eventually allowing predatory behaviors to be more frequently passed on in our lineage

A giant Atlantic cockle lies open on the beach in Fort Myers, Florida, while a beachcomber searches for shells in the background.

These Enchanting and Colorful Photos of Seashells and the Mollusks That Create Them Will Have You Marveling at the Natural World

Before they become sandy souvenirs, the baubles in the bubbles of the shoreline serve as a veritable fortress for creatures like clams, mussels and conchs

Illustration of the La Brea Tar Pit's ancient habitat, with the newly discovered toad species (center and right) and the Mexican burrowing toad (bottom)

Paleontologists Discover a New Species of Ice Age Toad at the La Brea Tar Pits, Offering Clues About the Area’s Ancient Climate

The fossilized remains, recovered in 1929, were part of La Brea’s relatively understudied amphibian collection. Since toads are cold-blooded and sensitive to environmental changes, the discovery can help researchers piece together past climate conditions

This might be the view a seal gets as it comes up from underwater to breathe: a polar bear, looking down for its prey.

See 16 Stunning Animal Images From the Wildlife Photographer of the Year Awards

Now in its 62nd year, the famed competition has released a sneak peek of the entries from this contest ahead of announcing the winners in October

Marmots can spend up to eight months in hibernation, so packing on the pounds during the short alpine summer is essential to their survival.

Cast Your Vote for the Chunkiest Alpine Rodent During Colorado’s First-Ever Fat Marmot Week

The inaugural competition puts eight yellow-bellied marmots head-to-head while shining a light on the science behind their seasonal weight gain and survival at high elevations

A long-clawed shrew seen in northern Japan

These Tiny Shrews Grow Bigger Snouts and Shrink Their Brains to Survive Harsh Winters, Study Suggests

Scientists have long known that some small mammals reduce their brain size during cold months and regrow them in the spring. Long-clawed shrews from Hokkaido, Japan, seem to follow that pattern—while their noses surprisingly do the opposite

The right side of the bird's body is male while the left side is female.

An ‘Extremely Rare’ Half-Male, Half-Female Bird Temporarily Took Up Residence Outside of Chicago

The unusual-looking bobolink is what’s called a bilateral gynandromorph. The bird behaved like a male, eventually wooing a mate and raising fledglings

A tufted gray langur strokes a grizzled giant squirrel in Yala National Park, Sri Lanka.

Do Monkeys Keep Pets? Study Finds Widespread Primate Interactions With Other Animal Species, From Mice to Deer

This social behavior might reveal the evolutionary roots of traits that underlie pet-keeping in humans, scientists say, from caregiving to tolerance and curiosity. But it’s not the same as a person keeping a cat or a dog

An image of the reef

These Coral Reefs Off West Africa Were Long Presumed Dead. Scientists Just Found Them Alive and Teeming With Life

Fish surveys in the 1960s detected what experts thought was a dead coral reef barrier off the country of Benin. Decades later, researchers set off in small fishing boats to investigate it using sonar mapping, underwater drone surveys and stationary video recorders

Redback spiders live throughout Australia.

Here’s Why These Male Spiders Sacrifice Themselves by Somersaulting Into Females’ Fangs While Mating

A new study suggest that even strange, complex animal behaviors can have a relatively simple genetic basis

Mountain lions change how deer behave, potentially preventing deadly deer-vehicle accidents.

Pumas Might Be Making Your Drive Home Safer. When the Predators Are Around, Deer Tend to Avoid Roads, Preventing Some Collisions

In Washington’s Olympic Peninsula, the wild cats’ presence corresponded with a 67 percent drop in the likelihood of a deer-vehicle crash and a 76 percent overall decline in the number of wrecks during a five-year period, according to a new study

Screenshot of Jackie from a livestream in April

Jackie the Bald Eagle, Who Captured Hearts Around the World Via Livestream, Has Died After Battling a Mysterious Illness

A raptor center in California had been caring for the animal since mid-July, after she had an altercation with two young eagles. But she had probably been sick long before then

The small blue, shown here, has lost about 40 percent of its habitat in the United Kingdom over the last 150 years.

Butterflies Around the World Are Moving to New Habitats, Largely Because of Climate Change, a Study Suggests

Researchers examined data on 1,758 butterfly species—about ten percent of all those known—from 105 countries and estimated that about one in ten global species has shifted its distribution range

Sperm whales seem to communicate differently in the presence of underwater shipping sounds.

Sperm Whales Seem to Change Their Calls When Ships Are Near, Highlighting the Implications of Underwater Noise Pollution

Several of the huge cetaceans living in the eastern Caribbean Sea shortened the intervals between their clicks and used one click pattern more than another when vessels were around, according to a new study

The dominant female wolf of Yellowstone's Canyon pack on February 26, 2015

Rooted in the American West: Food, History and Culture

Yellowstone Is Among the World’s Best Places to See Wild Wolves. Here’s the Story of the Animal Called Both ‘Public Enemy’ and Cultural Icon

A century ago, resident wolves were eliminated from the park. In 1995, biologists brought them back, marking a historic reintroduction of a top carnivore

Of the estimated 899 species of ticks worldwide, about 90 are found in the continental U.S.; however, only four species are responsible for most of the infections found in the U.S. today.

The First At-Home Test for Infected Ticks Could Improve Lyme Disease Diagnosis

LymeAlert will hit the market in August. The latest tool against the tick-borne illness could become a medicine cabinet staple

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