Mammals
Scientifically-speaking there are 11 mammal groups, and most Mammals are warm-blooded, have body hair, give live birth and nurse their young with milk from mammary glands. Check out these articles about all kinds of mammals.
How Often Do Whales Come Up for Air?
How Do Whales Sleep? They're Always Half Awake (Literally)
Are Whales Mammals? Yes, and They're Related to Hippos
The Largest Bat in the World Has a Wingspan Over 5 Feet
Baby Bats Babble With Moms, Hinting at Human Language Development
Fruit Bats Are the Best Pollinators (and Suppliers of Tequila)
What Do Pandas Eat (Other Than Bamboo)?
Polar Bear vs. Grizzly Bear: Which Bear Is Bigger and Tougher?
The Biggest Bear Stands 5 Feet Tall on All Fours (Not Even on Its Hind Legs)
Panther vs. Jaguar: Kind of Like Saying 'Apple vs. Granny Smith'
Siberian Tiger vs. Bengal Tiger: A Showdown of Big Cats
10 Types of Lions (Including 4 Extinct Species)
Hog vs. Pig: Are You Calling That Swine by the Right Name?
Elk vs. Deer Antlers, Size, Habitats and Voices (Yes, Voices)
Bison Bounced Back From Near Extinction
The Happiest Animal on Earth Is the Quokka
What Do Possums Eat? Most Things, It Turns Out
What's It Like Inside a Kangaroo's Pouch?
15 Types of Monkeys Climbing Trees All Around the World
What Do Gorillas Eat? How Are They Such Muscular Herbivores?
The Tarsier Is One Weird Primate, and Yes, We're Related
Is the Rat King Real or Simply an Urban Legend?
What Do Groundhogs Eat?
What Do Squirrels Eat (Aside From Nuts)?
What Do Skunks Eat? Just About Anything They Find
What Do Raccoons Eat? You Won't Be Surprised
What Do Foxes Eat When They're Not Raiding Your Garden?
Learn More / Page 4
Never heard of the tarsier? Well it's one of the smallest primates in the world but has some of the biggest bug eyes you've ever seen.
Leopard seals are the second largest species of seal in the Antarctic after the southern elephant seal. They're fast, powerful and eat basically anything that moves. Their only natural predator? The killer whale.
An orangutan who could unscrew bolts to bust out? A gorilla who climbed the vines out of her enclosure to just roam the zoo? These are wild animals, and these are their wild escape stories.
Advertisement
Pine martens are elusive and love to stay hidden in deep forests, but with strong claws, they are great climbers and hunters.
By Katie Carman
Marmosets are some of the smallest monkeys in the world and are found primarily in the forested areas of central Brazil. And the males support their mates in a very unique way.
A federal judge reversed a Trump administration ruling that removed the gray wolf from the Endangered Species Act. Here's why.
By Logan Smith
Kodiak bears are some of the largest bears in the world and live only in the islands of the Kodiak Archipelago in Alaska.
Advertisement
Hibernating mammals like ground squirrels can build some muscle mass during their big sleep, with the help of gut bacteria.
Pallas's cats appear cantankerous, in part due to their flat faces and large, owl-like eyes with round pupils.
By Katie Carman
The boxing kangaroo as a symbol of the Australian fighting spirit dates back to the 1890s, but what's the truth? Do kangaroos actually box?
Scientists have found striking parallels between the babbling produced by greater sac-winged bat pups and the babbling baby sounds of human infants.
Advertisement
Leucistic squirrels are rare, but Brevard, North Carolina has a thriving population.
You read that right. Fruit bats are instrumental in pollinating hundreds of plants, including the agave, a key ingredient in tequila.
By Mark Mancini
With a little pig snout and the locomotion of a kangaroo, these tiny desert rodents hardly ever drink water and rarely urinate.
Humpback whales can be as long as a city bus and weigh as much as two. They love to breach and water slap with their fins and tails, making them a perennial favorite for whale watchers.
By Katie Carman
Advertisement
It's a behavior synonymous with gorillas - beating the chest. But why do they do it? Researchers think they've figured out what the purpose is behind that pounding.
They look a lot like beavers and the two rodents have a lot in common. But muskrats are their own species with their own signature scent.
By Meg Sparwath
Badgers love to dig - one den, or "sett," in southern England is thought to cover a territory of over a square mile and have up to 100 entrances.
Red squirrels have a big attitude, which might have to due with their small size. They have to act big. And they do so with noisy and aggressive behavior.
By Mark Mancini
Advertisement
When threatened, the slow loris licks venom secreted from a gland under its arm. Licked and loaded, the loris is ready to poison an attacker with a bite.
There are over 60 species of langur in the world, all of which eat a plant-based diet and most of which burp a lot.
By Wendy Bowman
These chunky little guys aren't dogs at all. They're actually part of the rodent family, and they're shockingly smart.
By Meg Sparwath
The name dik-dik comes from the repetitive 'dik' sound the tiny female dik-dik makes when she feels threatened.
Advertisement
Servals have long legs and necks, which allow them to spot prey over the tall grasses of the savanna, but their huge ears give them their best weapon - an acute sense of hearing.
By Mark Mancini
Sperm whales are one of the largest creatures in the ocean. And they have the biggest brain on the planet. So are they also the smartest? We'll tell you.
By Wendy Bowman