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.

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The American Red Squirrel Is Small, Territorial and Aggressive

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.

The Slow Loris Is a Cuddly-looking Primate With a Toxic Bite

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.

Langurs Are Primates That Love to Monkey Around

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.

Why You Should Totally Dig Prairie Dogs

These chunky little guys aren't dogs at all. They're actually part of the rodent family, and they're shockingly smart.

Dik-dik: The Tiny Antelope With the Embarrassing Name

The name dik-dik comes from the repetitive 'dik' sound the tiny female dik-dik makes when she feels threatened.

The Serval Stands Tall and Jumps Like A Champion

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.

Socially Distancing When Ill Is Natural; Just Look at Vampire Bats

Vampire bats do it and so should we: socially distance when ill, that is. That's what a new study found.

9 Enormous Facts About Sperm Whales, Gigantic Creatures of the Sea

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.

The Caracal's Got Super Jumping Game and Satellite Dish Ears

Caracals have really cool ears and can also jump 10 feet in the air from a seated position.

What's the Difference Between a Brown Bear and a Black Bear?

Yes, the obvious fur color seems like a dead giveaway, but you can't always judge a bear by the color of its fur.

Are Mules, Burros and Jackasses All Donkeys?

Are these strong and dependable animals all the same? If so, why the different names? If not, what makes them different?

Are Dingoes Dangerous (and Did One Really Eat a Baby)?

These wily canines are probably best known because of the phrase "a dingo ate my baby." But come on. Did a dingo really eat a baby? And do they even attack humans?

What's the Difference Between a Dugong and a Manatee?

Their mamas may be the only ones who can tell them apart, but there are major differences between these cousins, one being the type of water in which they can survive.

The Echidna Is One of the World's Strangest Mammals

From the four-headed male reproductive organ to hosting the world's largest flea and sporting a body covered in spiny hairs, this cute little creature takes the cake for mammalian weirdness.

Tapir: The Ancient Fruitarian With the Tiny Trunk

The protection of these strange looking, ancient animals, and creatures like them, may be a key component in helping a planet in climate catastrophe.

Pikas Are the Pikachus of the Wild

Pikas are little mammals that, though they may look like rodents, are more closely related to rabbits.

The Rusty-spotted Cat Is a Teeny-tiny Wild Cat

This kitten-looking wild cat is known as the 'hummingbird of the cat family' and could almost fit in the palm of your hand, but its diminutive size belies a ferocious personality.

Aardwolf: Aaarvark? Wolf? Nope, It's a Tiny Hyena

Aardwolves aren't closely related to either aardvarks or wolves, but these little hyenas resemble both in some ways.

What's the Difference Between a Stoat and a Weasel?

The stoat and the weasel might look alike, but they're not the same animal. The stoat is a serious predator that kills its prey like a vampire!

Lemmings Jumping Off Cliffs En Masse Is a Myth

Lemmings don't commit mass suicide as is popularly believed, but they are aggressive and have even been known to charge larger predators.

Is It a Dog? A Raccoon? No, It's a Raccoon Dog!

Technically they're called tanuki, but these furry critters might as well be called raccoon dogs because that's what they look like. So are they just as domesticated and loving as the canines we know?

Spider Monkeys Are the Trapeze Artists of the Treetops

Spider monkeys, an endangered species, are the largest monkeys in the Americas and live in the forest canopy, where they swing through the trees with the greatest of ease.

If a Woodchuck Can't Chuck Wood, What Can It 'Chuck'?

It's an age-old question. How much wood would a woodchuck chuck? Turns out, none at all. So what would a woodchuck chuck if it couldn't chuck wood?

Is It a Zebra? A Giraffe? No, It's an Okapi

The okapi may look like a zebra-horse combo, but its closest relative is the giraffe. Here are nine fascinating facts about this curious creature.

An Anteater's Tongue Can Be 2 Feet Long! Plus 7 Other Peculiar Anteater Facts

The anteater has one of the strangest-looking noses in the animal kingdom, a truly fabulous hairdo and a tongue that reaches places never meant to see the light of day.