Ungulates

While they chew their cud, reindeer brains shift into a state of non-REM sleep.

Reindeer Sleep and Eat Simultaneously, Saving Precious Time in the Short Arctic Summer

While the animals chew their cud, they also enter a state of rest

Svalbard reindeer graze during an early snowfall. If temperatures rise again, food may be trapped under ice during a critical time for packing on winter pounds.

The World’s Smallest Reindeer Get Their Day in the Sun

On Norway’s Svalbard archipelago, a rare animal is thriving—for now

A guanaco successfully retrieves food from a cup with a lid.

Outsider Animals May Be the Best at Solving Problems

Researchers tested whether hoofed mammals could retrieve food from a lidded cup, and those lower in the pecking order were the most successful

Wolves on Pleasant Island are actively hunting and eating sea otters.

In Alaska, Hungry Wolves Have Started Eating Sea Otters

After devouring their island's deer, these canines may be the first land predators to rely on sea otters as a main food source

Lions in South Africa’s Greater Kruger National Park are feared by many different prey animals, which will run away as soon as they hear a lion growl.

How Animals Survive in a Savanna Full of Predators

Ecologists have documented a hierarchy of fear in the South African grassland, and the king of beasts is at the top

Donkeys often trample plants in the deserts of the southwestern United States, including in Death Valley National Park in California.

Cougars Are Killing Feral Donkeys, and That’s Good for Wetlands

Mountain lions play an important role in the Death Valley ecosystem by preying on the introduced species

Coronavirus has been found in white-tailed deer in the northeastern United States and central Canada.

First Possible Case of Covid-19 Spreading From Deer to Humans

Experts say the discovery is not reason for panic, but underscores the importance of monitoring wildlife for diseases that could infect humans

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Where’s Rudolph? Inside the Decline of Alaska’s Caribou

The antlered herd’s population is declining – what’s going on in the Alaskan wilderness?

The Makgadikgadi Pans National Park is part of a rare African open wild land. The environment is so harsh that zebras have to cover a lot of ground to survive.

Nothing Can Stop the Zebra

A 150-mile fence in the Kalahari Desert appeared to threaten Africa's zebras, but now researchers can breathe a sigh of relief

These pigs are used for baying, which is how hunters train their dogs to bring the pigs down.

A Plague of Pigs in Texas

Now numbering in the millions, these shockingly destructive and invasive wild hogs wreak havoc across the southern United States

Legend has it that camel jumping began many generations ago with a dare between two Zaraniq tribesmen.

The Sport of Camel Jumping

In the deserts of Yemen, Zaraniq tribesmen compete to leap camels in a single bound

"The numbers are incredible," says photographer Suzi Eszterhas of the multitudes of migrating wildebeests that cross from Tanzania to Kenya and back each year.

For Wildebeests, Danger Ahead

Africa's wildebeest migration pits a million thundering animals against a gantlet of perils, even—some experts fear—climate change

On the R.A. Brown Ranch, fifth-generation ranger Donnell Brown can't help thinking about the potential he had created through decades' worth of work.

Breeding the Perfect Bull

A Texas cattleman used genetic science to breed his masterpiece – a near-perfect Red Angus bull. Then nature took its course

Columbian mammoths were larger than mastodons. Both once roamed North America.

Mammoths and Mastodons: All American Monsters

A mammoth discovery in 1705 sparked a fossil craze and gave the young United States a symbol of national might

Working like "little pistons," donkeys keep the medina humming. An estimated 100,000 people in the Fez area depend on the animals for their livelihood.

Morocco's Extraordinary Donkeys

The author returns to Fez to explore the stubborn animal's central role in the life of this desert kingdom

Some biologist suggest that the emergence of the long neck on a giraffe was driven more by sexual success: males with longer necks won more battles, mated more often and passed on the advantage to future generations.

Things Are Looking Up for Niger’s Wild Giraffes

Wild giraffes are making a comeback despite having to compete for resources with some of the world's poorest people

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Q&A With the Rhino Man

Wildlife biologist Hemanta Mishra's efforts to save the endangered Indian rhinoceros

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The Sound of Hoofs

In a breathtaking spectacle, wildebeest by the millions are on the move this month in the Serengeti

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