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.

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

By Jesslyn Shields

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.

By Wendy Bowman

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

By Jesslyn Shields

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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!

By Wendy Bowman

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

By Jesslyn Shields

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?

By Patty Rasmussen

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.

By Jesslyn Shields

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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?

By Katie Carman

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.

By Wendy Bowman

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.

By Wendy Bowman

While yaks share the bovine family tree with cows, they're a different species altogether. And, unlike cow dung, yak poop doesn't stink.

By Katie Carman

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Wondering what's going on in the animal world while you're all cooped up under quarantine? Check out these webcams and get a virtual glimpse into how the animals live.

By Carrie Dennis

Known in some circles as a 'musk hog' or 'skunk pig,' the javelina's good looks may be in the eye of the beholder, but there's a lot more to this beauty than meets the eye.

By Wendy Bowman

The arctic fox is able to thrive in temperatures as low as -58 degrees F (-50 degrees C), largely because it has fur on the soles of its feet and the warmest coat of any animal on Earth.

By Wendy Bowman

Puma, panther, mountain cat, mountain lion, mountain screamer, painter, catamount and, yes, cougar. This cat has a lot of names!

By Wendy Bowman

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With their fierce jaws and cunning hunting tactics, spotted hyenas don't seem to have much to joke about. So what do those spine-chilling peals of laughter really mean?

By Cristen Conger

Seals have long been known as dry-land clappers, but the first-ever percussive clapping observed by scientists has blown seal clapping theory out of the water. Or should we say under the water?

By Tara Yarlagadda

The maned wolf might as well be called a werewolf given its unfortunate name. You see it's not a wolf at all, and despite all appearances, it isn't a fox either.

By Mark Mancini

The polar bear's shocking whiteness, ferocity and sheer size make it an icon of purity and power. How do these animals survive in a frigid climate?

By Julia Layton & Nathan Chandler

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But, squirrels that strongly prefer one hand over the other aren't as good at learning, one study suggests. What does this mean for you and me?

By Patty Rasmussen

They have been called both “coywolf” and “coydog,” but the majority of the scientific community recognizes this hybrid animal simply as the “eastern coyote.”

By Jesslyn Shields

Elk are some of the most majestic animals in the world, but also some of the most aggressive. Here's what you need to know about the territorial elk.

By Patty Rasmussen

With lightning speed and incredible vision, the cheetah is the fastest land animal on Earth and the best hunter on the savanna.

By Jesslyn Shields

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It may be the world's smallest fox, but its ears give it a huge hearing advantage.

By Michelle Konstantinovsky

Whaddya get when you cross a lion and a tiger? Yep — you get a liger, of course. But why are they considered controversial?

By Wendy Bowman