5 Creepy Things You Won't Believe Animals Are Learning to Do

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In a world filled with terrifying monsters, we humans are lucky that most of the things that want to eat us follow a pretty predictable set of rules. You're probably safe to take a trip to the DMV without getting attacked by sharks, for example. Likewise, you shouldn't worry too much about bear attacks while you're out sailing in the ocean. But as we've shown you in the past, the animal kingdom has its fair share of loose cannons who may break all the rules, but damn it all, they get things done.

Crocodiles Can Climb Trees

5 Creepy Things You Won't Believe Animals Are Learning to Do
Kristine Gingras/Dinets et al

When the time came for the dinosaurs to either die out or evolve into chickens, crocodiles clicked the opt-out box and continued right on existing as scaly armored nightmare machines. These giant meat blenders are more or less the dominant life form in whatever body of water they inhabit, and a good 20 feet of the land surrounding it. If you blunder into their territory, pretty much your only option is to find the highest tree to climb and hope they don't wait you out, Tremors-style.

5 Creepy Things You Won't Believe Animals Are Learning to Do
nopparatk/iStock/Getty Images

You can tell if they're waiting; you'll hear their clock tick.

Except ...

Crocodiles can totally climb trees.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Van Welsem/Australian Geographic

Chop them all down, then burn the wood. It's the only way to be safe.

For a long time, scientists assumed that crocodiles were more or less confined to two dimensions when out of the water. However, anecdotal reports of reptilian death from above got some researchers curious, and they set out to see if they could confirm the stories about tree-climbing crocodiles. Unfortunately for ground dwellers and your own impending night terrors, they found them. All over the world, from Colombia to Mississippi to the Philippines, crocs were scampering up trees like the devil's squirrels. And not just trees: Some were even spotted scaling chain-link fences and brick walls.

That's like suddenly realizing that your cat knows how to unlock your gun chest, only to find that almost every cat in the world knows the same trick. You'd think the silver lining here would be that they're at least restricted to the lower branches of relatively short trees, but nature loves nothing more than a surprise party: Juvenile crocodiles are sometimes found as high as 30 feet up in a tree, which you may recognize as about three stories above the ground. Which floor do you live on again?

Octopuses Can Move Across Dry Land

5 Creepy Things You Won't Believe Animals Are Learning to Do
Tuantube

Most of the time, the ghoulish monstrosities who inhabit the sea are content to stay there. Science has a scientific name for the land jellyfish -- they call it "dead." That presumably goes for anything else that isn't blessed with a skeleton to fight the tyranny of gravity.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Vinicius Tupinamba/Hemera/Getty 

Or a fishhook.

Except ...

Octopuses frequently crawl around on land. In this video, we see a little octopus going for a bit of a constitutional just to keep the old vigor up.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Tuantube

How shocking and terrifying and yet clumsy and sweet.

Octopuses are happy to crawl out of the water for several minutes to avoid predators, to look for food in other tide pools, or, if you own a pet store, to eat your other merchandise. Yep: They often crawl out of their own tank, seek out another tank, devour what's inside, and then sneak back into their own tank. They know enough to cloak their misdeeds -- we're pretty sure that's how Skynet starts. They're so stealthy about it that aquarium workers only know about the octopus' murderous roving by the damp tracks left between tanks. There you go: Half your horror novel is already written for you.

The only reason we don't see octopuses just moseying along the promenade every day is simply because they're mostly nocturnal, so their stalking happens under cover of darkness. As though that makes it less unsettling.

Armadillos Can Swim Underwater

5 Creepy Things You Won't Believe Animals Are Learning to Do
University of Michigan

Armadillos are nature's tiny Sherman tanks, scurrying their way across the sun-baked desert highways of North and South America. If we asked you to picture one, you'd most likely imagine it against a backdrop of cacti and wandering coyotes, or perhaps coiled up in a ball and rolling along the barren plain like a little beige Samus Aran.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Serjio74/iStock/Getty Images

Old cowboy trick: When you're thirsty, crack an armadillo open and fill your canteen.

You almost certainly didn't imagine it paddling across a lake and chilling with the fish.

Except ...

Against all reason, armadillos are pretty fantastically well-designed for water. It turns out nature's own speed bump is capable of filling its armored tummy with air and floating across relatively large bodies of water like the world's most adorable D-Day invasion.

Their stomachs and intestines can hold enough air to counteract the weight of their armored shells, allowing them to dog-paddle across ponds, rivers, and lakes. In fact, it's not too uncommon for people to find armadillos taking a little leisure time in their swimming pools.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Carey Whaley

"Whatever. I'm not the one peeing in it."

If that's not surprising enough, armadillos can dive underwater for up to eight minutes by holding their breath and using their claws to walk along the bottom. They'll often employ this trick to cross rivers. If that doesn't seem remarkable to you, picture diving to the bottom of a river one day only to find a happy armadillo casually motoring across the bottom. You'd think the Matrix had glitched and loaded him in the wrong spot.

Female Brown Trout Fake Their Orgasms

5 Creepy Things You Won't Believe Animals Are Learning to Do
Vladimír Vítek/iStock/Getty Images

Sex seems a lot simpler in the animal kingdom. Sure, the foreplay is often bizarre and complicated, but in general, the act itself is pretty straightforward. There's no performance anxiety, no seething regret, no intricate set of rules dictating whether you should leave before or after breakfast. (Hint: It varies, depending on who climaxed first and whether orange juice is offered.)

5 Creepy Things You Won't Believe Animals Are Learning to Do
Eising/Digital Vision/Getty Images

If trout's on the menu, get the hell out.

Except ...

The female brown trout fakes orgasms to avoid having her eggs fertilized by inept males.

Perhaps the term "orgasm" is taking some liberties, but the effect is the same: Ordinarily, the female trout will extrude a clutch of eggs so that the male can decorate them with his sexual frosting (fish don't really "get" the pull-out method), but if the female doesn't judge her suitor to be worthy -- if he's positioned wrong, or the timing is off -- then she only pretends to climax. The males are often so excited by this faux-gasm that they "finish early," despite the fact that she didn't actually release any eggs.

5 Creepy Things You Won't Believe Animals Are Learning to Do
DanBachKristensen/iStock/Getty Images

"Doesn't matter, had sex."

Although one thing remains certain across species: Most of the males don't care as long as they get theirs. The male trout are usually satisfied by this display and swim off to play whatever the fish version of Halo is, while the females are free to get with the real men who know to stick around until everybody crosses the finish line.

5 Creepy Things You Won't Believe Animals Are Learning to Do

The City-Building, Pack-Hunting Spider

5 Creepy Things You Won't Believe Animals Are Learning to Do
Maxime Lambert

If there's one redeeming feature of spiders (and there is not: shut up, spider apologists, we all know you're just Internet-spiders using your terrible spindly legs to type), it's that they tend to be solitary creatures. If you arrive home late at night and wind up getting a face full of web, you can more or less "relax" after swatting at your head and neck for 20 minutes, secure in the knowledge that there was only one spider on you and not like 73.

5 Creepy Things You Won't Believe Animals Are Learning to Do
Ablestock.com/AbleStock.com/Getty Images

"Webs can't have multiple spiders. Our symmetry would be ruined."

It's evidence of the relative mercy of Mother Nature that she's only willing to subject us to one spider at a time. Even that cold-hearted bitch knows spider gangs are too much for our collective sanity to handle.

Except ...

Meet Agelena consociata and all of her many, many friends.

5 Creepy Things You Won't Believe Animals Are Learning to Do
via West Lake Scientific

Her name literally means "slutty angel." Maybe.

Flying in the face of everything you hold dear in this world, this species of African funnel web spider forms together into communal "sisterhoods" of anywhere from 10 to 15-fucking-hundred spiders in a single web scaffold that can be as tall as 13 feet, and there is no good point to stop these emphasizing italics because everything is terrifying.

While most spiders will gladly murder one another for food, territory, or just good old fashioned fun, the Agelena are happy to work together toward a common goal. That goal, of course, also involves murder. When an unsuspecting insect (or, say, your face) stumbles into their web-sheet of doom, as many as 20 to 40 spiders will immediately descend upon it and treat it to the most horrifying end you'll find outside of a Carpenter film.

One more time, just so you can wrap your head around this: Pack-hunting spiders that live in colonies of thousands and build spider cities 3 feet higher than a god damn basketball hoop actually exist. Right here, on this planet, with you. This is the single most compelling reason we can think of for re-funding our space program.


David makes up science at SciTechGadget and can be found polluting the Internet on Twitter and Zombiechops.

And check out 21 Ways Life Would Change if We Could Understand Animals, because we're pretty sure all of those things will be true soon.

Related Reading: And if you thought all that was insane, wait'll you read that dogs have an internal compass that determines where they poop. By the way, you don't know terror until you've seen this caterpillar that looks like living poop. Not scared enough yet? This toad has a weaponized mustache.

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