koala that looks intense with blue eyes


1. Crocodiles

Crocodiles are one of the easier-to-spot Australian critters. These things lurk in the depths of swamps and bayous, waiting for nearby animals to stop by for a drink. And once they dip their heads into the depths, snap! The crocodile lunges forward, snaps its jaws into the creature’s neck, and then bam, donezo, the thing is dead.

crocodile on the swampy Australian shorescrocodile on the swampy Australian shores

When traveling to Australia, you should definitely watch out for these guys. While you’ll likely know if you’re in their territory, you’ll want to keep an extra eye out for anything that appears to look like a log. That log might just have the urge to kill. And you could be the thing it’s after.

2. Great White Sharks

Great White Sharks are terrifying aquatic beasts that we are all familiar with. Thanks to things like “Shark Week” and “Jaws,” we are all well-acquainted with the lore that surrounds them. They are, according to movies and television, horribly vicious and blood-thirsty serial killers. It shouldn’t surprise you that this portrayal is a little bit off.

great white in the sea looking at cameragreat white in the sea looking at camera

Rather than a thirst for blood, the white shark has a taste for seals. This is why it occasionally takes a bite of the surfer: from below, the shark’s terrible vision guides it into thinking that the shadowy surface is a nice blubbery seal. And so, it strikes. Still, however, despite its general innocuousness to humans, the shark is dangerous. Aptly, it can be found off Australian shores.

3. Thorny Dragons

The thorny dragon is one of the coolest-looking creatures around. And, fortunately, it doesn’t pose any immediate threat to humans. The only problem might be if you see one while driving recklessly down the freeway. The problem with this might be that the distraction from its coolness would make you crash and burn.

a thorny dragon looking very acrimoniousa thorny dragon looking very acrimonious

But other than that, the creature evolved these thorns to protect against predation. If you wanted to eat the thing, you would clearly encounter some problems. It’d be like trying to eat a pineapple without stripping it of its nasty barbs. Most of us, needless to say, are not fascinated by such an endeavor.

4. Box Jellyfish

You wouldn’t think that anything with “box” in its name would be so horrifyingly deadly. Unfortunately, this tends to be the case. The box jellyfish, found off Australian shorelines, is one of the most deadly creatures of the sea. And why, exactly, is this? Well, because the darned thing is so poisonous.

a jellyfish swimming through the watera jellyfish swimming through the water

One sting from the tiny box jellyfish is enough to render you almost immediately paralyzed. And, in case you were unaware, being paralyzed in the water is far from preferable. Once you lose control of your limbs, drowning becomes an impending fear. And so, this is a strong reason to try and avoid open waters without diving suits.

5. Kangaroos

Most people think that kangaroos are cute and fun. Most people are wrong. Kangaroos are not only un-fun, they are freakin’ dangerous. Sometimes they square up like a professional boxer, trying to take out both you and your peers. And you know what they say about getting into a fight with a kangaroo? Don’t do it.

kangaroo that looks extremely and unnecessarily aggressivekangaroo that looks extremely and unnecessarily aggressive

The kangaroo, unlike other marsupials of Australia, is built to kick. They can use their tails to balance as they do so. This makes them horribly adept adversaries. Since we don’t want to be on the other end of these kicks, it’s best to stay out of the kangaroo’s way. And because of that, they have made our list.

6. Cassowaries

The cassowary is very similar to an ostrich. They are similarly of the ratite family, which includes ostriches and the now-extinct moa bird. You can find them on the Australian continent as well as a few of the Indonesian islands just a bit north. They are, let’s just say, dangerous.

a bird head that is blue and beautifula bird head that is blue and beautiful

You can tell the bird provides nothing but a bad time just by looking at its face. It’s blue, it’s red, it’s saddled with a neck that makes you feel nothing but pure, exquisite fear. One of the more terrifying features of this bird is its claws. These razor-sharp talons are enough to rip you open and eat your innards. We don’t want this. No thanks, Australia.

7. Brown Snakes

The brown snake is a family of snakes that exists in abundance in Australia. They also have an abundance of terrible poison. One of the more common of these snakes is the eastern brown snake. Considered the second deadliest land snake, it would not be a challenge for this snake to paralyze you and leave you dead. No good.

a snake in the ground slitheringa snake in the ground slithering

You’ll find this deadly snake, as you probably could’ve guessed, all along the eastern coast of Australia. And guess what? Many of the most popular tourist destinations are along the east coast. If your plan is to venture to Australia for a fun vacation, then, you might want to keep an eye toward the ground.

8. Redback Spiders

The redback spider is essentially Australia’s version of a black widow spider. But, as with anything from Australia, it is a thousand times worse. Why? Because its hourglass is on the top! Gah! In reality, a bite from the horrid beast might not kill you. Among the things that it will do is induce a whole lot of pain and nausea.

A spider looking terrible and blackA spider looking terrible and black

Given that most of us don’t like these things, we should try to avoid the spider. This doesn’t necessarily imply that we should avoid the Australian continent—far from it. Instead, if we visit the country, we should come equipped with a flamethrower. Anytime we see the spider, we could just break it out and get shooting.

9. The Taipan

The taipan is another of Australia’s many poisonous snakes. So with that, it is in line with Australia’s generally terrible nature. But other than that, it is fast and large and very venomous. They are so venomous, in fact, that they beat out the Australian brown snake.

a snake on the grounda snake on the ground

You should fear the taipan. Coastal versions, which differ from the inland versions, are also poisonous. While they aren’t as poisonous, they are poisonous enough to kill. Fortunately, people have invented anti-venoms for the horrible bites. While this does save the Aussie from potential death, it doesn’t save them from the thousands of other death-inducing things that live on the continent.

10. The Blue-Ringed Octopus

The blue-ringed octopus is one of the most beautiful cephalopods around. But, since we know the thing lives in Australia, we can assume a few things about it. And what’s the most salient of these things? You guessed it: it’s extremely deadly. So deadly, in fact, that a sting from this guy could send you into a feverish spiral toward death.

Blue-Ringed Octopus, Mabul Island, MalaysiaBlue-Ringed Octopus, Mabul Island, Malaysia

The blue-ringed octopus has been called “the most venomous animal.” It only makes sense that it would make its home in Australia. The way the little beast kills you is through the toxins in its bite. This is the same toxin, tetrodotoxin, that is released from the pufferfish. The octopus, let’s just say, has looks that kill.

11. Irukandji Jellyfish

Another of the terrible jellyfish of the Australian waters is the Irukandji jellyfish. This jelly is unbelievably small—about a cubic centimeter in size. Because of this, the jellyfish is extremely dangerous. It’s like trying to avoid an invisible army of pennies. Oh, and these pennies can kill you by the faintest touch.

jellyfish in a vilejellyfish in a vile

What’s worse is that the actual tentacles of the thing stretch about a meter in length. That is substantially longer than the rest of the body. That is something you will want to avoid. Apparently the venom can last in your system for weeks. Ugh. Australia has quite the long list of plights to deal with. This jellyfish is just one of many.

12. Echidnas

The echidna is not exactly deadly; it’s just full of so many prickly bits that you couldn’t give it the hug it so desperately wants. If you wanted to cuddle with this gnarly Australian beast, you’d likely have to find one in baby form. And to do that, you’d likely have to find one of their nests.

a spiky creature in the grassa spiky creature in the grass

And to do that, you would likely have to go outside, which, in Australia, we know increases your chances of dying by 200 percent. Either way, these echidna show the type of defenses you must evolve if you’re trying to survive in the Australian outback. In order to stave off potential foes, you need to let them know that you are not interested in their predatory assertions.

13. The Platypus

The platypus is a mastery of deception. On the outside, it looks like your furry run-of-the-mill marsupial. However, upon closer inspection, you realize that it’s a poisonous fiend hellbent on worldwide destruction. The thing comes generously bundled with toxins that can kill a full-grown adult male. This isn’t, in other words, a marsupial you would want to tangle with.

a dangerous creature lurks in the depthsa dangerous creature lurks in the depths

The platypus lays its eggs, wades through the water, then waits for the kill. Its bill enables it to ensnare its prey in the most ducky way possible. This is, if you ask us, one of the worst ways to go. While a bear might tear through your flesh with claws and teeth, the platypus will not only instill death but embarrassment.

14. Stonefish

Stonefish, as you might expect, look like stones. They look so much like stones, in fact, that people often step on them. As one of the most venomous fish in the world, such a misstep would have, let’s just say, some horrible side effects. And, characteristically, this thing lives in the Land Down Under.

a fish that looks like a rocka fish that looks like a rock

The way in which the stonefish stings you is through the spines in its back. Once these spines penetrate the skin, they release toxins that seep into the affected tissue and bloodstream. After the stuff spreads, you are in trouble. So much trouble, in fact, that you might want to immediately call for help.

15. Wombats

Wombats are, again, deceptively cute. They have tiny eyeballs, a furry coat, and a friendly demeanor that says “cuddle me.” Yet, when you delve more deeply into their habits and disposition, you realize they are one of the most deadly beasts on planet Earth. They are more dangerous than the tyrannosaurus, ichthyosaurus, and allosaurus combined.

wombat looking coolwombat looking cool

Okay, this is slight hyperbole. The things are, relative to most other Australian critters, not all that bad. They won’t bite you with their horrible bills or inject you with their terrible poison. All they’ll do is maul you with their terrible little claws. Given that is not how you would like to spend your Tuesday afternoon, you should probably steer clear of these furry bad boys.

16. Brown Huntsman Spiders

The brown huntsman spider is unique among spiders. And why is this? Because they are unbelievably large. So large, in fact, that if you saw one, you would probably explode in fear. And, if that doesn’t happen, you will probably get bitten by one. Yikes.

a spider in a subwoofera spider in a subwoofer

The spider measures around five inches in width. This is awful. The spider is not too poisonous, however. This is fortunate. But even given the spider’s lack of death-inducing poison, it is characteristically Australian in that it is unbelievably ugly and terrifying. We should empathize with the Australians that have to share a continent with them.

17. Koalas

The koala is deadly not because of any poison or toxin, but instead because of its deception. No, it won’t steal your wallet and pilfer your identity. Instead, it will trick you into thinking it is cute and cuddly, when it is anything but. It is one of the thousands of things that plague the Australian existence.

koala that looks intense with blue eyeskoala that looks intense with blue eyes

Other reasons to look out for these koalas is that they are arboreal. They can, in other words, attack you from above. And if there’s anything we know about warfare, it’s that those who attack from above are exceptionally advantaged. If we want to get a leg up on these guys, we’ll have to take to the trees. Unfortunately, the trees are full of other dangerous things, like snakes. Ugh.

18. The Macrotis

The macrotis is a species of Australian marsupial that looks cute as can be. It kind of looks like a mix between a rat and a bunny. It’s got big ears, a rat-like face, and a coat of fur that suggests it likes to keep itself warm—an odd trait considering that it lives on a continent that is almost entirely desert.

an animal with giant earsan animal with giant ears

The most salient fact about the macrotis is its ears. These likely evolved their dopey shape as a way to hear incoming predators. The frequencies of sound in the environment funnel into their ears, which they subsequently use to understand the direction of the sound. And with this, they are better able to detect the location of predators.

19. Cane Toads

The cane toad is not indigenous to the Australian continent. They were brought in to help control the destructive cane beetle population. Unfortunately, they quickly became a horribly invasive and destructive species. Now they are thriving, much to the detriment of other species in the area.

a cane toad that looks grossa cane toad that looks gross

The cane toad is horribly poisonous. Introduced to Australia in 1935, they immediately became a pestilence. We even have them here in the United States, wreaking havoc and all. It is of paramount importance that we attempt to remove the cane toad from the Australian habitat. But to know how to do this is quite the problem.

20. Wallabies

Wallabies are another species of kangaroo that exist in Australia. And, like the general kangaroos we discussed earlier, these bad boys are primed to kick their way into supremacy. So, with that, we know that upon first sight we should avoid them, as it were, like the plague.

a kangaroo stands upa kangaroo stands up

Despite the animal’s status as the smallest species of kangaroo, we know that the things are still capable of pure, unrelenting terror. Unfortunately, the species is endangered because people hunt them for meat. They should stop that. Hunting any animal into extinction is a terrible thing, and the wallaby is no exception.

21. The Sugar Glider

The sugar glider is one of the most terrifying marsupials in existence. This is mostly because of its ability to glide through the air. And, despite the thing’s name, the sugar glider is all but sweet. Some people own these things as pets, only to later find out that the flying squirrel-like creatures have the unfortunate tendency of attacking them.

a little animal with big eyesa little animal with big eyes

Several reports have surfaced from owners complaining about the animal flying into their heads and attacking them when they least expected it. Typical of an Australian fauna species. What’s more, the thing is nocturnal. This means that while you’re sleeping, it can plot against you. This is bad. You should get a leg up by planning when they’re asleep.

22. The Tiger Quoll

The tiger quoll is so named because of its spotty appearance. Fortunately, it doesn’t have the same bone-crushing jaws or flesh-tearing claws as a tiger. It is, instead, only a small marsupial. Still, however, the thing is from Australia—i.e., we should be suspicious of its intentions. Anything from Australia is likely to kill and kill again.

ferocious animal opening its mawsferocious animal opening its maws

The tiger quoll is a carnivorous beast, killing other small marsupials in Australia and Tasmania—its local habitats. Thankfully, you are not one of these. You can thank the past 200 or so million years of evolution for this. Had you gone some other evolutionary route, separating along with those of Australia, you might have to consider this thing your foe.

23. Funnel Web Spiders

Funnel web spiders are awful. They are poisonous. They live beneath the ground. They are uncomfortably large. All around, they are awful little creatures. It makes sense, then, that they live in Australia. In Sydney, for instance, you can find yourself a couple of these spiders. You probably wouldn’t want to, but you could.

Photo: David McClenaghan CSIRO Entomology Hexathelidae

The funnel web spider is one of those that isn’t cute and cuddly like the ogre-faced spider, but horrible and wicked and all of those other pejoratives only employed to describe the worst existing things. You’ll want to check your swimming pool, then, because these eight-legged beasts have an affinity for water.

24. Tasmanian Devils

Most things with “devil” in the name are bad. The Tasmanian devil, local to both Tasmania and Australia, is no exception. The wombat-looking creature is often a nuisance. It is known for having one of the strongest jaws around for an animal of its size. This should intimidate you if you ever anticipate making your way to the southern island of Tasmania.

a rabid animal with its mouth opena rabid animal with its mouth open

Another reason you’ll want to avoid the creature is that it’s probably carrying a bunch of diseases. This is true of many feral creatures. And since these diseases are often uncongenial to humans, you’ll want to avoid them like the plague. Given that these might be carrying the plague, the phrase makes sense.

25. Dingoes

The dingo is one of the most notorious creatures on Earth. Known for sneaking into people’s houses while they’re out grocery shopping, and eating their children whole, the things are especially dangerous. They are kind of like a fox that has a penchant for death, destruction, and mayhem. Given that Australia is a democracy, this is problematic.

a dog of australia looking cool and orangea dog of australia looking cool and orange

The dingo is one of Australia’s wild dogs. Most often, you will find them roaming the desert looking for snacks. Unfortunately, the dingo is also going into extinction. This horrible fact should be a priority for those in Australia to remedy. The cute little dogs should not have their species ended so terribly. Hopefully we can save the dingo.

NEXT: Now let’s take a look at the World’s Deadliest Animals (Ranked)

29. Alligators

These huge reptiles certainly are a scary sight, but out of every animal on this list, they’re responsible for the fewest human deaths per year. Alligators only kill about three people each year. In fact, more people die from lightning strikes in the US than from alligators.

Alligator on golf courseAlligator on golf course
ABC News

Alligators keep growing throughout their life. Most males are around eight to ten feet long, but they can get up to 15 feet long in old age. Amazingly, they’ve been seen using sticks to lure in birds who are looking for nest building materials. And while alligators are mostly known for eating fish, mammals, and other animals, sometimes they eat fruit, too.

28. Wolves

Wolves have had a terrible reputation for a long time. They nearly went extinct in the US, because they were hunted and killed just for the purpose of getting rid of them. While they can be harmful to livestock, they don’t kill very many people per year. Only a couple deaths a year are from wolf attacks, some of which are from rabid wolves.

The Local Denmark

In contrast, several hundred wolves are killed by humans each year in the US. Sometimes they’re killed because they ate someone’s livestock, but this can actually increase the amount of livestock eaten next year. Wolves are very social animals, so killing them disrupts their pack structure and can lead to more wolves eating livestock than their normal prey.

27. Sharks

While there have been numerous movies depicting deadly shark attacks (think Jaws, Sharknado, and The Meg), shark attacks are pretty rare and deaths from them are even rarer. About six to ten people per year die from shark attacks, while around 150 are attacked each year. Less than a hundred of those are unprovoked, though.

Shark and personShark and person
Caribbean Soul

Every hour, people kill 11,417 sharks. In a year, that adds up to 100 million dead sharks. Many of them are being killed for their fins, which are used to make shark fin soup. A lot are killed as by-catch, meaning that people were fishing for something else but accidentally killed a shark instead. Humans do a lot more damage to sharks than they do to us.

27.5 The deadliest sharks

While sharks don’t kill many people per year, the ones that do are limited to only a few different species. Everyone knows great white sharks (aka white sharks if you ask a biologist) can be deadly. They have probably attacked the most humans out of any shark.


The runners up are the tiger shark and bull shark. Both of these species are willing to eat just about anything, so they take their chances sometimes with humans. Every other species has only attacked humans 30 times or less, on record. Out of the 400 or so species, most have never hurt a human in their millions of years on Earth.

26. Bears

Despite our teddification of bears, in which we turned them into a display of love between high schoolers at a carnival or family members at a hospital, they are still frightening wild animals. Every year, about 12 people die from being mauled by a bear. This includes bears around the world, from the brown bears of North America to the sloth bears of India.

Sloth bearSloth bear
Bear Trust International

Sloth bears, despite eating mostly insects and fruits, are possibly the most aggressive bear. It’s probably because they have to fend off tigers, who sometimes try to eat them. Bears most often kill people when bears and humans accidentally encounter each other, which is especially dangerous if the bear has cubs.

25. Spiders

While spiders are probably one of the scariest animals on earth, they aren’t even close to the deadliest. It’s true that there’s potentially lethal spiders (the worst of which live in Australia) but they don’t actually kill a lot of people. In the US, about seven people die each year from the bites of either black widows or brown recluses.

Redback spider australiaRedback spider australia

Since antivenom was invented for the funnel-web and redback spiders, Australians really aren’t dying from their bites either. In 2016, the first Australian in 37 years died of a spider bite. Actually, many of the bites from these venomous pests aren’t severe enough to kill a person. However, plenty of people still are hospitalized because of them.

25.5 The most venomous spider

Brazilian wandering spiders are often called the most venomous and deadliest spider on Earth. There are eight different species, all belonging to the genus Phoneutria, which means “murderess” in Greek. All eight live in Brazil, but some live throughout Latin America. They’re often confused with a completely harmless spider that looks similar.

Steve Downer

Rather than building webs to catch food, Brazilian wandering spiders walk about the forest floor, hunting and ambushing small animals like reptiles, spiders, and mice. Their bite gives people severe burning pain, nausea, hypothermia, and other symptoms. It can be lethal, but victims usually take antivenin and the spiders rarely inject all of their venom in one bite.

24. Ants

Generally, the average American only encounters ants that are simply a nuisance, but some people say ants kill around 30 people each year. Of course, these deaths are worldwide, where there are all kinds of ants. There are actually more than 10,000 ant species, many of which live in tropical forests.

Driver antDriver ant
Our Breathing Planet

Fire ants are well known for being aggressive and they have killed people by stinging them, because it can cause an allergic reaction. About 9 people in the US die each year from ants. However, elsewhere ants can kill with venomous stings (if you got stung like a few hundred times). Driver ants, like the ones from Indiana Jones 4, could potentially eat a person if they weren’t moving.

24.5 The deadliest ant

The bulldog ant is considered the most dangerous ant in the world, because it’s very aggressive and stings its victims with venom. When attacking, a bulldog ant clamps on its victim with its mandibles and then curls its body and injects its stinger into the animal. These ants bite several times, injecting venom each time.


As with many of the world’s most venomous animals, bulldog ants live in Australia. They aren’t afraid of humans, though, despite the enormous size difference. However, only three human fatalities have been recorded since 1936, but a person can die within 15 minutes of the sting.

23. Cows

Cows are certainly not viewed as particularly scary, but when they’re falling from the sky, you’d probably reconsider. Jumping off a cliff is only one of the several ways cows have killed people. For example, sometimes dogs agitate cows and once the owner gets involved, it doesn’t end well. Other times, cows are purposefully aggressive and attack people.


Cows have even been seen ganging up on unlucky people. It may have something to do with the fact that humans kill millions of them per year. Of course, there are cases where it’s just accidental; maybe the cow was in an enclosed space and got spooked, crushing the poor person. About 20 Americans die each year from cows, but worldwide it’s more.

22. Horses

While horse girls may be crazy for horses, they probably aren’t thinking about the dangers they pose to people. Horses kill about 20 people a year in the US, several a year in Australia, and probably more worldwide. Surprisingly, horses kill more people in Australia than the country’s superbly venomous snakes and spiders.

Horse attacks dogHorse attacks dog
Ekaterina Druz

Many of these deaths are from people falling off the horses, so try not to fall off when riding them (it’s just that easy!). Occasionally, horses do attack people, but it’s pretty uncommon. There’s also hundreds of race horses dying at the tracks each year because they’ve been pushed too far, so maybe throwing a rider off is just a little payback.

21. Lions

Dorothy was right to be afraid of lions, because many are not cowardly at all. Lions kill around 70 to 100 people each year, some of whom they eat. Whenever a big cat gets a taste for human flesh and actively hunts people, they’re called a man-eater. This isn’t normal behavior, but there are a few possible explanations. 

Lion and lion whispererLion and lion whisperer

For example, in 1898 there were a pair of lions that killed between 35 and 135 railroad workers in Kenya. The two were shot and killed, but when scientists inspected their skulls decades later, they found a compelling reason for why the lions turned man-eater. Their teeth and jaws were damaged, likely keeping them from hunting their normal prey.

21.5 The deadliest cat

The deadliest cat on Earth is actually the tiny, but wild black-footed cat, who are smaller than many pet cats. Sure they may not be killing any humans, but they kill the most prey out of any cat. Each night these kitties kill about 10 to 14 rodents and birds, as a result of their 60 percent success rate.

Cat Conservation Trust

The fearsome and scary lions are only successful about 25 percent of the time. Black-footed cats have to eat so much every night because they are so small. It gives them a very fast metabolism and a very large appetite. These little killers live in the grasslands of Africa, where they’re the smallest cat around.

20. Tigers

Outside of the west, where they’re a popular favorite among animal lovers, tigers are viewed quite fearfully. In India, people often live not too far from them and as the largest big cats, they’re pretty scary next door neighbors. But since their habitat has been reduced so much, there’s a lot more tigers in a smaller space, which causes problems. Around a hundred people each year die from tiger attacks, but it can be highly variable.

Animal Planet

There have been many notorious tiger man-eaters. Many of them likely turned to eating humans because of injuries, like the pair of lions, or because they can’t control their own territory (which they need to get food). However, tigers mostly kill humans out of just accidental run-ins, perhaps because they’re being territorial.

19. Box jellyfish

It’s estimated that around a hundred people die each year from box jellyfish stings, which each have enough venom to kill about 60 people. These 24-eyed marine creatures inject toxins into people’s blood, causing their heart to stop. Although some people die a different way; they go into shock and drown because the pain is so intense.

Box jellyfishBox jellyfish
Thomas P. Peschak/National Geographic

However, some people stung by them don’t actually die, if they get to shore and treatment in time. The most deadly species of box jellyfish live around Australia, but some live near Hawaii and Florida. They’re 10 feet tall, because their 15 tentacles are so long. Nemo’s dad was very lucky that the jellyfish he encountered were not the deadly box jellyfish.

18. Bees, wasps, and hornets

Every year perhaps a hundred or more people die from bee, wasp, or hornet stings. While some of the deaths have been caused by a whole lot of stings on one person, most were actually due to allergic reactions. About 58 people in the US die from these insects per year, which make them one of the more surprisingly deadly animals in the United States.

Bee flowerBee flower

So instead of worrying about sharks while you’re swimming, worry about whether or not you have your EpiPen on you while going about your day. Bees just aren’t as sweet as the honey they make. But their dwindling numbers are cause for concern, because they pollinate quite a lot of our food.

18.5 The most venomous hornet

Perhaps the deadliest of all bees, wasps, and hornets is the Asian giant hornet. It’s the largest hornet in the world and is five times larger than the average honey bee. They have deadly venom and can kill about 40 honeybees a minute. While we know that honeybees are a killer, these guys pack an even more potent punch.

Vermont Public Radio

Asian giant hornet venom destroys people’s red blood cells, sometimes leading to kidney failure and death. Many people die from allergies to the venom, though, and about 40 people in Japan die each year from these hornet stings. People have said their sting is insanely painful and feels like a hot nail driving into their skin.

17. Cape buffalo

Cape buffalo, also known as “The Black Death” and “widowmaker,” are notoriously dangerous among hunters in Africa. When wounded, they’ll run off and then sometimes circle back to attack the hunter who shot them. It’s almost like they were upset about getting shot, but that’s just a wild guess.

Cape buffaloCape buffalo
Senalala Luxury Safari Camp

There are some estimates that say Cape buffalo kill about 200 people a year. And despite the fact that they’re herbivores, their killing isn’t limited to humans. When lions attack them, Cape buffalo will sometimes fight back and kill the lion instead. It’s pretty brutal, because in the process the buffalo will fling a lion up in the air.

16. Leopards

There isn’t a lot of data about how many people leopards kill, but some have suggested that it’s in the hundreds each year. Just like tigers and lions, they can be man-eaters. There are several examples of it in history; certain leopards killed more than a hundred people just by themselves.


When it comes to big cats, the human deaths per year are highly variable, since some man-eaters have killed a lot more than others. Plus, there might not even be a man-eater for some time, in which case deaths are just from accidental meetings. Like tigers, leopards are mostly killing people in India.

15. Deer

Deer are not known for being aggressive, but they do kill around 240 people per year (and probably more than that). Most of these deaths are from car accidents, since deer have a funny little habit of suddenly jumping out onto the road, despite a car speeding down it.

Deer crossing roadDeer crossing road

Of course, we’ve confused them by putting death lanes smack in the middle of their territory. They haven’t exactly had a lot of time to evolve and adapt to the changing environment. Hopefully, deer will learn how to cross the street and stop causing so many accidents, because they’re victims of them too.

14. Kudu

Similar to how deer kill people, drivers in Africa sometimes die from colliding with the greater kudu antelope. While exact numbers are hard to find for how many people kudu kill, the Food and Agriculture Organization of the United Nations reported that, at least in Namibia, it’s more than crocodiles kill.

Kudu antelope road carsKudu antelope road cars
Barcroft Media

Of course, the kudu usually die in this encounter, too. So they don’t get anything out of this meeting. Part of the problem is that kudu actually thrive in human populated areas, because they like abandoned fields and pastures. And also like deer, kudu are hunted for their meat.

13. Elephants

If Dumbo hadn’t been a Disney film, we probably would have seen Dumbo’s mom, Mrs. Jumbo, kill the people teasing her baby. Elephants kill about 500 people per year, but the attacks are actually becoming more common. Their habitat is shrinking and so they’re forced to be around humans more often.

Earth Touch

Some researchers think elephants are killing people because they have a form of PTSD and remember that humans killed their family. The aggression is being passed between family members, so people are turning to unconventional methods to keep wild elephants away. They’ve used chili powder and domestic elephants to deter the large animals from coming too close.

12. Hippopotamuses

Hippos are territorial and huge (they can get up to 6,000 pounds!) so naturally, they pose a threat to humans. About 500 deaths per year are caused by these “river horses” (as their name translates in Greek). The attacks are sometimes because humans appear to pose a threat to hippo calves, and this makes the hippo moms get very angry.

Hippos hippopotamusHippos hippopotamus

They’ve trampled people, pulled them into lakes, tipped over boats, and even bitten heads off. Unfortunately, since they’ve lost a lot of habitat, they’re forced to live closer to humans. But humans have killed plenty of them, too, and George Washington even had a set of false teeth made out of their chompers (not wood, as the myth goes).

11. Tapeworms

They’re nasty and creepy, and nobody likes them, but tapeworms continue to infect and kill approximately 700 unfortunate people each year. Their murder weapon is the disease cysticercosis, which they spread through human excrement (you’ll see this is a common theme in some of the deadliest animals). Their danger combines with their alien-like grotesqueness in quite the unpleasant way. 


These deaths occur worldwide, but mostly in the rural areas of developing countries, because it’s linked to poor hygiene. People get the disease from swallowing eggs that came from contaminated food or fingers. If that wasn’t gross enough, you should know that it’s prevalent wherever pigs eat human feces.

10. Crocodiles

It’s hard to find exact numbers, but it’s estimated that crocodiles kill about 1,000 people per year. However, it’s likely that many attacks aren’t reported. Crocodiles are quite deadly because they can easily live near humans without being noticed and then snap someone up very quickly. Most of these attacks are in Africa, so crocodiles have earned the title of most deadly African large animal.

Nile CrocodileNile Crocodile
Kids Biology

Hippos and cape buffaloes have been contenders for that same title, but they’ve been beat out. Some people in Africa don’t believe real crocodiles are doing the attacks. Instead, they believe that the crocodile culprits are made by witches or perhaps controlled by spirits. Either way, there’s a lot of crocodiles and they live over a large range, giving them ample opportunities to kill.

9. Scorpions

While there are around 2,000 different scorpion species, only about 25 species of scorpion have venom that is potentially lethal to humans. Every year, these species kill about 3,250 people. However, most of these deaths are caused by one species: the Brazilian yellow scorpion. It lives in South America and stings thousands of people a year.

Brazilian yellow scorpionBrazilian yellow scorpion
Planet Deadly

Unfortunately, the antivenom for the Brazilian yellow scorpion isn’t totally effective and can sometimes cause lethal allergic reactions. So imagine trying to be cured, and then dying from the medicine. Just try to stay away from these horrible creatures as much as possible. Other super venomous scorpions live in the Middle East, Africa, Asia, and the southwestern US.

9.5 The most venomous scorpion

The deathstalker scorpion is often named the most venomous scorpion and has the name to show for it. They live in the Middle East, hunting at night for worms and centipedes. Once they find their prey, the scorpions sting and paralyze them. It doesn’t inject all its venom at once.


Research shows that 0.25mg (aka less than a hundredth of an ounce) of their venom could kill over 2 pounds worth of mice. Venom potency is hard to measure, though, because we can’t exactly test the venom on humans. Plus, different animals have evolved venom for different uses, so it is hard to compare them.

8. Ascaris roundworms

These gross little worms are responsible for around 4,500 deaths per year. They cause the disease ascariasis worldwide, but mostly in developing countries with warm and humid climates. Luckily, ascariasis is uncommon in the US. It’s largely a product of bad hygiene because of how the worms spread. 

Ascaris roundwormAscaris roundworm
Medical News Today

The worms live in the small intestine of unsuspecting people and spread their eggs through human excrement. If this excrement contaminates water or dirt, or gets on food because it’s used as fertilizer, it just spreads the worms further. There are treatments for the disease, but people can even get it from pigs.

7. Tsetse flies

The tsetse fly lives in rural Africa, where it spreads sleeping sickness. There are less than 5,000 cases reported each year, but the death count is rather uncertain. Plus, it’s likely that more people get the disease than we know. Sleeping sickness can be cured, but some people just don’t have access to the cure.

Tsetse flyTsetse fly
AgriBusiness Zambia

The good news, though, is that there are fewer and fewer cases each year. In 1998, 40,000 people reported they had the disease, so in just a decade it’s prevalence has gone down drastically. But just in case, get your swatters ready for if you see this little fly.

6. Kissing bugs

Also known as the “assassin bug,” the kissing bug causes about 12,000 human deaths per year. It spreads the Chagas disease in Latin America through its excrement, which it puts on people’s skin. As we learned from some of the other deadly animals, excrement should just generally be avoided if one plans to prosper in this world of creepy crawlies.

Kissing assassin bugKissing assassin bug

But kissing bugs make it difficult to avoid their excrement, because they regularly bite sleeping people right on the face. In fact, this is how they got their charming and misleading name. So while Dementors are purely from J.K. Rowling’s imagination, this kiss of death is very much real.

5. Dogs

About 25,000 to 35,000 people per year are killed by man’s supposed best friend, dogs. Most of these deaths are actually due to rabies, though, so you can’t entirely blame the pups. But despite what you might have heard from Michael Scott, rabies is a fully preventable disease. They can be our most loyal companions, but that companionship means more humans are exposed to more of the dangerous canines, as well. 

Rabid dogRabid dog
Wilmington Star News

Dogs can be vaccinated against rabies, but in Africa, Asia, and Latin America there are a lot of stray dogs that haven’t yet been to the vet. Regardless where you live, you should probably vaccinate your dog. It’s a win-win situation, because it protects both you and the pooch.

4. Blood flukes (via freshwater snails)

You know the animal is bad if it’s got “blood” in the name. Blood flukes are a type of parasitic worm, called schistosomes, that cause the disease schistosomiasis. They live and grow in freshwater snails, but then move to humans when people come in contact with contaminated water. They actually get into humans through the skin, instead of open parts like the mouth.

Blood fluke schistosomaBlood fluke schistosoma

In humans, they live in the liver, veins, and urinary tract. The worms lay eggs inside people, which are then spread through human excrement. This disease is mostly in Africa, but also in other poor communities in places like South America and the Middle East. There are treatments for it, but not everyone has access to them.

4.5 The most venomous snail

While freshwater snails kill people with their unwanted passengers the blood flukes, other snails are seriously venomous. Marine cone snails launch one of their venom-filled teeth at fish to slow them down. It paralyzes the fish, so the cone snail can catch up and eat it.


A cone snail’s tooth is sharp enough to go through a wetsuit, so they can be problematic for divers. The sting can be fatal to humans if they don’t seek medical attention, but only 36 deaths have been recorded since 1670. Next time you see a snail, though, just remember that just because it’s slow doesn’t mean it’s harmless.

3. Snakes

Snakes have certainly earned the frightful reputation that surrounds them. Many people say they kill 50,000 people per year, but it might be as high as 200,000. Their venomous bites are nothing to trifle with and Taipan snakes are probably the worst. The Inland Taipan could kill more than 100 people with one bite, if it could just get its jaws around that many people at once.

Carpet viperCarpet viper

While Taipan live in Australia, snakes are a much bigger problem in India. They’re also a menace in Africa, Latin America, Pakistan, Afghanistan, and East Asia. In Australia, only a few people die each year from snake bites, though many more are hospitalized. Still, watch out for the cobras, vipers, and kraits, because they are not your friendly neighborhood garter snakes.

3.5 Most venomous snake

The inland taipan often ranks as the most venomous snake. It doesn’t have the largest quantity of venom, but its venom is very potent against mammals. These snakes live in Australian deserts where humans are unlikely to come across them. But when it does feel threatened, the inland taipan bites several times in a row.


Inland taipan venom has neurotoxins, which cause victims to have slurred speech, seizures, and inability to control their limbs. The venom also contains hemotoxins, which lead to internal bleeding. Most of the time, though, people who get bitten by inland taipans are handling the snake. They aren’t just surprised by a snake sneak attack.

2. Mosquitoes

While probably the smallest animal on this list, mosquitoes are truly frightening. Every year they kill about 725,000 people, by transmitting diseases like malaria, dengue fever, yellow fever, and encephalitis. There are more than 3,000 species of mosquitoes, which is more mosquitoes than should exist in the first place.

Genetic Literacy Project

Mostly, they’re killing people in Sub-Saharan Africa, Asia, and Latin America. But on top of the hundreds of thousands that die, millions more are suffering through these diseases. Mosquitoes really are out to get us. Some scientists are thinking about using gene editing to just get rid of them all, by introducing a mutation that makes females sterile.

2.5 Malaria vaccine

While the number of malaria victims has been halved in the last 15 years, via mosquito nets, insecticides, and other methods, scientists are trying to take another crack at the disease. But the death toll has risen in recent years because funding for preventative measures has dried up and the disease has developed drug-resistance (not to mention mosquitoes are spreading further).

Malaria vaccine lab scientistMalaria vaccine lab scientist
Brendan Smialowski/Stringer/Getty Images

So, to combat this killer, scientists have been developing a malaria vaccine (or at least attempting to). Perhaps a big obstacle in the construction of a successful malaria vaccine is the fact that getting the disease does not make you immune to it.

2.75 Malaria vaccine part 2

Despite the troubles of manufacturing, scientists are pushing the malaria vaccine further. Just recently, they started giving it out in Malawi as part of a pilot program. But the vaccine isn’t perfect: kids have to get four shots before they reach age two. And even then, it only works about 40 percent of the time.

Malaria vaccine research labMalaria vaccine research lab
Brendan Smialowski/Stringer/Getty Images

However, during its trial in Kenya, it did reduce severe malaria cases by about 30 percent — which is clearly better than nothing. Still, there’s concern that the disease will become resistant to it and that the immunity doesn’t last for long. Plus, the vaccine may have some side effects.

1. Humans

As seen on TV, humans murder each other quite a bit. While Western crime shows are certainly exaggerating, researchers have found that humans murder about 437,000 other humans each year. But if you add war deaths to this, the total goes up: around 135,000 deaths in 2017 were from war. Of course, this number changes a lot year to year, depending on who’s decided to battle it out.

Crime scene NCISCrime scene NCIS
TV Fanatic

However, murder and war aren’t the only ways people kill each other. Over a million people die from road traffic each year. China and India have the most traffic-related deaths, at over 200,000 each. In the US, it’s around 35,000 deaths per year. We really are our own worst enemy.

Honorable mention: fleas

While they don’t kill many people these days, fleas were once a huge threat. They were responsible for spreading the Bubonic Plague, or Black Death, that killed about 25 million people. The fleas jumped from rats, who carried the plague, to humans and bit the poor people to death.


A few cases of Bubonic Plague have popped up in recent times, but nowhere near on the scale of the European outbreak in the Middle Ages. Of course, back then, people didn’t know that they should be afraid of these tiny little bugs. But while fleas were once the deadliest animal on earth, things have changed and there are new contenders.

Honorable mention: golden poison dart frog

One golden poison dart frog has enough poison to kill 10 adult men. They’re the size of a paper clip but some say they’re the most poisonous animals alive. However, they don’t actually kill that many people. The Embera tribe in Colombia used to use their poison for hunting, covering their darts in it.

Golden poison dart frogGolden poison dart frog
iStock/Getty Images

But for all their deadliness, these frogs aren’t making the poison themselves. They actually appear to get it from their diet. They eat toxic ants and mites, building up the poison in their own bodies. The frogs’ bright colors act as a natural warning sign for predators.

Honorable mention: stonefish

Nicknamed the “World’s Most Venomous Fish,” the stonefish lies in camouflaged wait to ambush its prey. But despite their potent venom, they don’t use it to hunt. Instead, the venom is for protection from predators. It’s strong enough to kill an adult in under an hour.

Stonefish deadly animalStonefish deadly animal
iStock/Getty Images

But despite its deadliness, the stonefish rarely kills anyone. In 2010, the first reported death in 27 years happened in Japan. Plus, people can get stung and survive, as long as they go to a hospital quickly. To avoid the danger altogether, it’s good to wear felt bottom booties in the shallow tropical waters.

Honorable mention: pufferfish

Pufferfish have a poison that is 1,200 times more poisonous than cyanide; one fish could kill 30 adults with its poison. Several people die each year from this fish because it’s considered a delicacy in Japan. Specially trained and licensed chefs prepare the pufferfish, known as fugu.

Fugu pufferfish deadly animalFugu pufferfish deadly animal
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The supremely poisonous liver is actually illegal to serve, but people still eat it and occasionally die from its neurotoxin. Most of the pufferfish’s victims are the ones who caught it in the first place, almost like a sort of revenge. Some of these anglers try to prepare and eat it themselves, but their amateur ways become their demise.

Honorable mention: pigs

On occasion, pigs take revenge against their bacon-filled destinies. There have been a few cases where pigs have eaten people. In one case, a farmer went to feed his pigs and never came back. He might have collapsed from a heart attack or other medical emergency, only to succumb to his pigs.

Pig deadly animalPig deadly animal
Johan Spaedtke/Wikimedia Commons

In Rome, a group of mafia assassins fed a man alive to pigs. They beat him first, but the pigs still had a taste for blood. Pigs may have a reputation for being dumb pieces of meat, but they are very smart animals. Plus they can weigh like 700 pounds.

Honorable mention: cougar

Every now and then, people die from cougar attacks. There isn’t one each year, but generally every few years. Last year, Washington saw its first cougar fatality in 94 years. It seems the cougar attacked the two bikers because it was starving.

Mountain lion cougar deadly animalMountain lion cougar deadly animal
iStock/Getty Images

The important thing to know if you encounter a cougar is to not run. It’s far better to make a loud noise to scare it off. If you run, it’ll see you as prey and chase you down. Cougars live in 16 U.S. states. In most, they can be hunted, but with limitations. In California, they can’t be killed for sport at all.