Top 10 Most Aggressive Animals

By aggressive I mean animals which can be provoked easily and will attack without warning. Not necessarily to humans, it can be any animal including others of its own species.
The Top Ten
Hippopotamus The common hippopotamus, or hippo, is a large, mostly herbivorous mammal in sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus.

Hippos are extremely territorial. Don't get close, or they may charge at you and impale you on their 2-foot-long canines.

Males will often lock mouths with each other in a fight for a pod of females, and females will fight to protect their calves. Hippos kill over 500 people per year due to their short tempers.

Strangely, hippos are more violent than crocodiles. Lions will attack only if you're too close or if they are very hungry. Hippos won't hesitate to chase you the moment they catch a glimpse of you.

Wild Boar
Saltwater Crocodile The saltwater crocodile, also known as the estuarine crocodile, Indo-Pacific crocodile, marine crocodile, sea crocodile or informally as saltie, is the largest of all living reptiles, as well as the largest riparian predator in the world.

Don't go near their eggs, or risk having one bite you in half.

Black Mamba The black mamba is a species of extremely venomous snake, a member of the family Elapidae native to parts of Sub-Saharan Africa.
Tasmanian Devil The Tasmanian devil is a carnivorous marsupial native to the island of Tasmania in Australia. It is characterized by its stocky build, black fur, and powerful jaws. Tasmanian devils are known for their fierce temperament and distinctive vocalizations that include screeches and growls. They have a strong... read more

They will fight to the death to defend their food. Unless you want a challenge, keep away.

Sun Bear
Wolverine The wolverine, Gulo gulo, also referred to as the glutton, carcajou, skunk bear, or quickhatch, is the largest land-dwelling species of the family Mustelidae.

This animal should be #1 on the list, easily. First off, hippopotamuses only attack if you invade their territory, most commonly water. Wolverines, on the other hand, will actively hunt for prey instead of staying in their territory waiting for something to enter, which in the hippo's case would be a crocodile, big fish, zebra, or anything else that might enter its territory in search of water, such as a bison.

A shark would only attack you if it smelled blood, you were making noise, or you attacked it - specific reasons that make it easy to avoid a shark. Also, if you weren't doing any of these things, the chance of a shark attacking you is less than the chance of being struck by lightning.

Lastly, and most specifically, a wolverine is obviously more aggressive and territorial than a grizzly. If a wolverine encountered a grizzly (a wolverine is nearly one-third the size of a grizzly), the wolverine would be the first to attack, although it probably wouldn't win.

Cassowary The cassowaries are ratites in the genus Casuarius and are native to the tropical forests of New Guinea, nearby islands, and northeastern Australia.
Human Humans (Homo sapiens) are the most abundant and widespread species of primate, characterized by bipedalism and large, complex brains. This has enabled the development of advanced tools, culture, and language. Humans are highly social and tend to live in complex social structures composed of many cooperating... read more

By far the most aggressive and deadly animal on this Earth. It is also the only animal that destroys its own habitat and is known to be very cruel towards every other living species.

We are mammals, which makes us animals. We kill and rob each other, so we are the most aggressive.

What have we done to this world?

Cape Buffalo The African buffalo or Cape buffalo is a large African bovine. Syncerus caffer caffer, the Cape buffalo, is the typical subspecies, and the largest one, found in Southern and East Africa.

These animals are extremely unpredictable! Have you seen the battle from Kruger? These Buffaloes nearly killed a pride of lions. Not to mention that a baby Buffalo had around 8 lions trying to suffocate it, and it still survived. This animal needs to be at least in the top 2.

This is the animal that makes lions look like cowards. They may unexpectedly start charging at their target, horns forward, and attack. This especially happens if there are calves nearby. They can kill up to 200 people a year. They also fight for dominance in a herd.

The Newcomers

? Cat The cat (Felis catus) is a domestic species of small carnivorous mammal.
It is the only domesticated species in the family Felidae and is often referred to as the domestic cat to distinguish it from the wild members of the family. A cat can either be a house cat, a farm cat or a feral cat; the latter... read more
? King Cobra The king cobra is an elapid found predominantly in forests from India through Southeast Asia.

The King cobra is probably best known as the species of choice for the South Asia snake charmers. Even though cobras can hear, they are actually deaf to all ambient noises instead, they sense the ground... read more
The Contenders
Elephant Seal Elephant seals are large, oceangoing earless seals in the genus Mirounga. The two species, the northern elephant seal (M.

The power of lust gives these beasts the aggression that sends them absolutely insane when a rival male wanders into their territory. Armed with a 4-tonne body and sharp canines, they don't mess around. Fights between these animals are a daily occurrence during breeding season.

Rhinoceros A rhinoceros, commonly abbreviated to rhino, is a member of any of the five extant species (or numerous extinct species) of odd-toed ungulates in the family Rhinocerotidae. (It can also refer to a member of any of the extinct species of the superfamily Rhinocerotoidea.) Two of the extant species are... read more

Armed with a large horn that can grow up to 5 feet long, if something gets impaled on it, it'll know about it.

Elephant Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephant, the African forest elephant, and the Asian elephant. They are the only surviving members of the family Elephantidae and the order Proboscidea, extinct relatives include mammoths... read more

Similar to the hippo, just bigger, slower, and lacking the canines, preferring tusks that can grow up to 3 meters long.

Honey Badger The honey badger, also known as the ratel, is widely distributed in Africa, Southwest Asia, and in the Indian subcontinent.

This reckless creature will dive into bee nests for sweet honey. Fearless by nature, the Honey Badger is not one to be messed with.

One of these can take down two lions!

Killer Whale The Orca, or Killer Whale (Orcinus orca), is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is recognizable by its black-and-white patterned body. Orcas are a cosmopolitan species and can be found in all of the world's oceans, in a variety of marine environments,... read more

Sharks seem to fear the Killer Whale for a good reason. Killer Whales have been known to kill sharks. They will try extremely hard to catch seals, even beaching themselves (and then getting back in the water). They are very enduring, known to chase their prey for many hours in an attempt to exhaust them. Then it's time to rip them apart.

Golden Eagle

I don't know if they just like to scare grizzly bears "for the lulz" or what. But you know what they have done? They've attempted many challenges, including against honey badgers and grizzly bears. These birds don't seem to believe in the rule of predation. It seems they will try to kill anything.

The only case of one attacking a human was in Golden Eagle Snatches Kid.

Tiger The tiger (Panthera tigris) is the largest living cat species and a member of the genus Panthera. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily preys on ungulates such as deer and wild boar. It is territorial and generally... read more
Lion The lion (Panthera leo) is a large cat of the genus Panthera native to Africa and India. It has a muscular, broad-chested body, short, rounded head, round ears, and a hairy tuft at the end of its tail. It is sexually dimorphic; adult male lions are larger than females and have a prominent mane. It is... read more
Monkey Monkeys are haplorhine primates, a paraphyletic group generally possessing tails and consisting of approximately 260 known living species.

How were they not added yet? Nothing against them, but they're definitely aggressive.

Africanized Honey Bee
Chimpanzee Chimpanzees are primates of the genus Pan which consists of the common chimpanzee and the bonobo. They are a part of the tribe Hominini, which also includes humans, and the family Hominidae where all great apes are included. Like their closest living relatives the modern humans, chimpanzees are social... read more

Travis the Chimp can explain everything. Chimps also wage war and occasionally eat baby chimps.

Goat The goat or domestic goat (Capra hircus) is a domesticated species of goat-antelope typically kept as livestock. It was domesticated from the wild goat (C. aegagrus) of Southwest Asia and Eastern Europe. The goat is a member of the animal family Bovidae and the tribe Caprini, meaning it is closely related... read more
Polar Bear The polar bear is a carnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses.
Moose
Grizzly Bear The grizzly bear less commonly called the silvertip bear, is any North American morphological form or subspecies of brown bear.
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