Why Are Hippos So Angry All The Time?

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The otherwise laid-back hippos can be very aggressive when it comes to their territory. Male hippos will, as early as seven years old, start to learn and display aggressive shows of behavior. They are well known to open their mouths extremely wide and show off their massive tusks and teeth.

As relaxed as they may seem, when hippos in the wild come across humans in their territory, they get very mad, very quick. It doesn’t matter if they’re having a quick soak in the water or if they’re out lazing in the savannah, hippos will charge at a boat or a jeep with the same ferocity. This is especially terrifying when you consider that hippos are also deceptively quick. In fact, hippos can hit top speeds of around 30 kilometers per hour on land, and close to 10 kilometers per hour in the water.

Hippo charges after a speedboat.

Hippos attack a lot of people. According to an estimate quoted by the BBC, approximately 500 people lose their lives every year to hippo attacks in Africa. Although there aren’t any direct studies to support that number, there are many reported cases of people ending up in the hospital because of a hippo.

However, it is worthwhile to ask the question… what exactly provokes these hippos? After all, the humans that hippos generally come across do not pose any danger to them. In most cases, they aren’t poachers, hunters, or members of a crazed and angry mob; they are often just unassuming tourists who are exploring new lands or recreational hobbyists, like kayakers, who like being out in the wild, or local fishermen doing their job.

So, what is it about humans that rubs hippos the wrong way?

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Why Do Hippos Hate Humans So Much?

As it turns out, it isn’t personal between hippos and humans! Yes, hippos do have a general dislike towards humans. And lions. And hyenas. And pretty much any other wild animal that intrudes on their territory. Hippos are intensely territorial and dominant animals. Male hippos will, as early as seven years old, start to learn and display aggressive shows of behavior. They are well known to open their mouths extremely wide and show off their massive tusks and teeth to deter predators or invaders.

Also Read: We Domesticated Horses, Then Why Not Zebras?

Crocodiles And Hippos: An Unhappy Marriage In The Water

If there’s any animal that has gotten the stick end of dealing with hippos, it’s the crocodile. Poor crocodiles get into conflicts on an almost daily basis with hippos due to their overlapping habitat preferences. In fact, a video posted on National Geographic even captured a young bull seemingly playing with a crocodile and tossing it around in the water. To make matters worse for the poor croc, the hippo followed it onto land, where it continued to agitate it by apparently trying to “chomp” down on the croc for fun.

While hippos generally prefer to play with other hippos, it is not an uncommon sight to spot crocodiles and hippos lurking mere meters apart from one another. Both species show a strong preference for spending most of their time in the water, and when on land, both also relax and wind down in the same way—basking in the sun!

Crocs and hippos often share the same habitat.  (Photo Credit : -Nick Greaves/Shutterstock)

It’s uncommon to observe prey and predator side by side so often, and more importantly, for so long!

One would assume that crocs, being crocs, would be well within their rights to hunt down hippos, yet they can’t. Like Tantalus’ fruits, crocs can never hunt down a hippo. Despite having the strongest bite force in the entire terrestrial animal kingdom, crocs are often let down by their teeth. Hippos, on the other hand, have massive teeth that measure up to around half a meter (1.5 feet) in length!

In comparison, a crocodile’s teeth can only reach up to 0.1 meters (4 inches) in length. Yikes!

To make matters worse for crocs, hippos have a pretty decent bite force themselves. In fact, if we were to rank all the bite forces of extant terrestrial animals, number one billing would go to crocs, but can you guess who gets the number two spot? Hippos! So, unless it’s an abandoned calf or an already injured adult, crocs generally leave hippos alone.

Hippos are also generally better equipped to deal with crocodiles than crocodiles are equipped to deal with hippos. Hippos are heavier and bigger than crocodiles, and have thick skin to help defend themselves from ambush attacks from their long-snouted neighbors.

Also Read: Do Animals Have Wars Like Humans Do?

Is There Any Animal A Hippo Doesn’t Mess With?

Don’t rush off to declare hippos as the kings and queens of the savannah and grassland just yet. While they are incredible beasts who can best be described as absolute units, there still is one animal to whom even hippos bow down. These animals are none other than the gently giant elephants.

Elephants don’t even have to herd together to command hippos’ respect. Even an entire pod of hippos will let solitary elephants pass by undeterred. All of this comes down to the sheer size of elephants. Elephants are much larger and bigger than hippos, and can knock the living daylights out of them. Elephants have been previously filmed knocking over hippos. Especially when they threaten elephant calves, female elephants have been known to get incredibly aggressive and may even stomp on hippos once they have them immobilized.


It all just comes down to territoriality and dominance displays with hippos. They are generally very defensive of their habitat and will be hostile to any foreign object (living or not) that encroaches on their territory. So next time you find yourself on safari in Africa, just be sure to keep your distance!

References (click to expand)
  1. Haddara, M. M., Haberisoni, J. B., Trelles, M., Gohou, J.-P., Christella, K., Dominguez, L., & Ali, E. (2020, August 1). Hippopotamus bite morbidity: a report of 11 cases from Burundi. Oxford Medical Case Reports. Oxford University Press (OUP).
  2. 9 of the World's Deadliest Mammals | Britannica. britannica.com
  3. Hippo | San Diego Zoo Animals & Plants. The San Diego Zoo
  4. Proof African Hippos Do What They Want - National Geographic. National Geographic
  5. Facts about hippos | Live Science. Live Science
About the Author

Joshika Komarla is a Chemistry, Botany, and Zoology graduate from St. Joseph’s University, Bangalore. Apart from being a full-time F1 and football fan, she’s also a budding ecologist on a mission to boop every plant and animal in the world. On any given day, you can find her annoying her dog by yelling “cat”, meowing, and running away.

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