What is the deadliest animal in the world? The surprising animal you've already met. (2024)

Liam GravvatUSA TODAY

From alligators to hippos to pythons, Earth's animals aren't always the most peaceful, especially wild ones.

Ourworldindata.org says humans have identified over two million animal species;yet, there are an estimated fiveto 10 million species,including those undiscovered, on the planet.

According to a study from Utah State University's Department of Wildland Resources, "over 47,000 people annually in the United States sought medical attention after being attacked or bitten by wildlife."

What's the one animal that outranks all others in terms of danger, and what should you do if you come across it?

What is the most dangerous animal in the world?

According toa-z-animals.com, mosquitos are the deadliest animals in the world, killing an estimated 750,000 to 1 million humans yearly. With up to 110 trillion mosquitoes on the planet, the insects can carry lethal diseases likemalaria, dengue fever, West Nile virus and Zika virus. There are 16,000 mosquitoes on the planet for every one person.

According to the Centers for Disease Control and Prevention, 435,000 people died from malaria in 2017. This disease threatens almost half the world’s population, andlymphatic filariasis affects “120 million people in 72 countries.”

To avoid mosquito bites, the CDC recommends insect repellent, long-sleeved clothing with sufficient coverage, screens on windows and doors, air conditioning and mosquito nets on strollers or your sleeping and living areas.

The CDC emphasizes the importance of cleaning and clearing out containers that hold water, as these can become mosquito nesting grounds.

Top 10 deadliest animals in the world

Here are the animals that cause the most human deaths each year, according to Discover Wildlife:

  1. Mosquitos: 725,000-1,000,000 deaths per year
  2. Humans: 431,000 deaths per year
  3. Freshwater snails: 200,000 deaths per year
  4. Saw-scaled viper: 138,000 deaths per year
  5. Assassin bugs: 10,000 deaths per year
  6. Scorpions: 2,600 deaths per year
  7. Ascaris roundworms: 2,500 deaths per year
  8. Saltwater crocodiles: 1,000 deaths per year
  9. Elephants: 500 deaths per year
  10. Hippopotamus: 500 deaths per year

What to do if you’re bitten by a mosquito

Symptoms of mosquito bites include an itchy, puffy red bump, small blisters and dark bruise-like spots, says the CDC. More extreme reactions --common in children, adults who have never been bitten before and those with a compromised immune system --consist of swelling, redness, fevers, hives and swollen lymph nodes.

To treat a mosquito bite, wash the bite area with soap and water. Use an ice pack for 10 minutes, paired with anti-itch cream and a baking soda and water mixture to reduce swelling and itching. Do not scratch the bite, as this can cause infection.

If your bite symptoms worsen, it may be infected or you may have contracted a disease. Contact your healthcare provider for treatment and next steps should your condition worsen.

How to get rid of mosquito bites: home remedies you can use to soothe the itch

What is the most aggressive animal in the world?

The Nile crocodile is the most aggressive animal in the worldmostly becauseit considers humans a “regular part of its diet” according to a-z-animals.com. The animal can weigh up to 1,650 poundsandcan be found in 26 countries in sub-Saharan Africa. Every year, Nile crocodiles kill hundreds of people, saysa-z-animals.com.

Fire ants and hippos make up the second and third spots on a-z-animals.com’s list of aggressive animals. Fire ants often attack for no reason,and hippopotamuses kill “at least 500 people every year.”

Just Curious for more?

Here atJust Curious, we're looking into all of your questions. From "Do lady bugs bite?" to what to bring camping to more information about mosquitos and how to get rid of them, make sure to check out USA TODAY's Just Curious section for more trivia, tidbits and information you might want to know.

What is the deadliest animal in the world? The surprising animal you've already met. (2024)

FAQs

What is the deadliest animal in the world? The surprising animal you've already met.? ›

1. Mosquito (780,000 deaths per year) The tiny mosquito is the most dangerous animal in the world, claiming 780,000 lives annually.

What is the 1 deadliest animal in the world? ›

Mosquitos are the deadliest creature in the world because they transmit a number of deadly diseases, the worst of which is malaria. Malaria is a mosquito-borne disease caused by a parasite that results in fever, chills, headache, vomiting and, if left untreated, death.

What animal is surprisingly dangerous? ›

The platypus has a range of features that make it quite unlike any other animal. With a large bill, a paddle-like tail, webbed feet and a furry body, this funny-looking animal produces venom that evolved to cause pain, mainly in other platypuses.

What is the most dangerous animal to meet in the wild? ›

World's most dangerous animals
  1. Saltwater crocodile. They've been around on earth since the Pliocene era, so crocodiles have had plenty of time to evolve into one of Mother Nature's most efficient killing machines. ...
  2. Great white shark. ...
  3. Hippo. ...
  4. Tiger. ...
  5. Lion. ...
  6. African elephant.
  7. Grizzly bears. ...
  8. Poison dart frog.
Sep 5, 2022

What kills humans the most? ›

This includes cardiovascular diseases, cancer, and chronic respiratory diseases. They tend to develop gradually over time and aren't infectious themselves. Heart diseases were the most common cause, responsible for a third of all deaths globally. Cancers were in second, causing almost one-in-five deaths.

What animal kills more humans? ›

Mosquitoes are the most dangerous animal in the world, killing 725,000 humans per year through spreading diseases such as malaria.

What animal is scary but harmless? ›

Vulture. Vultures are often demonized because of their frightening appearance, intimidating wing span, and inappropriate habit of only showing up when there's a dead carcass lying around. But they're completely harmless—as long as you're alive and kicking.

What is the least feared animal? ›

TOP TEN MOST HARMLESS ANIMALS IN THE WORLD
  • Llama. Llamas (Lama Glama) are related to camels. ...
  • Manatee. The manatee (Trichechus) is an herbivore that is not aggressive and doesn't prey on other species. ...
  • Red Panda. ...
  • Manta Ray. ...
  • Giant African Millipede. ...
  • Opossum. ...
  • Butterfly. ...
  • 3. Aye-Aye.
Jan 5, 2022

What animal is shy but strong? ›

Aardvark. As the strongest animal of the Shy Five, the aardvark is a powerful termite-eating digger.

What is the scariest extinct animal? ›

Deinosuchus, The Giant Crocodile

Deinosuchus is one of the most dangerous extinct animals, whose genus name means terrible crocodile in Greek, and lived in the Cretaceous period about 82 million to 73 million years ago.

What animal kills over 500 humans a year? ›

Hippopotamus (Hippopotamus amphibius)

In actual fact, hippos kill many more people every year. Causing an estimated 500 deaths annually (as compared to only 22 for lions), hippos are deadly land mammals.

What is the world's cutest animal? ›

10 Cutest Animals In The World
  • Munchkin Cats. ...
  • Red Panda. ...
  • Penguin. ...
  • Otter. ...
  • Baby Elephant. ...
  • Koala. ...
  • Meerkat. Meerkat are friendly mammals found in southern Africa. ...
  • Hedgehog. Hedgehog are tiny, spiky animals found mostly in Europe, Asia, and Africa.

What animal kills the most humans besides mosquitoes? ›

After mosquitoes, these animals are most deadly to humans each year, according to Discover Wildlife:
  • Freshwater snails: 200,000 deaths per year.
  • Saw-scaled viper: 138,000 deaths per year.
  • Assassin bugs: 10,000 deaths per year.
  • Scorpions: 2,600 deaths per year.
  • Ascaris roundworms: 2,500 deaths per year.
Feb 1, 2023

What animals are not afraid of humans? ›

The most famous example is the dodo, which owed its extinction in large part to a lack of fear of humans, and many species of penguin (which, although wary of sea predators, have no real land predators and therefore are very bold and curious towards humans).

What is the most poisonous thing in the world? ›

The blue-ringed octopodes (Hapalochlaena spp.) produce tetrodotoxin, which is extremely toxic to even the healthiest adult humans, though the number of actual fatalities they have caused is far lower than the number caused by spiders and snakes, with which human contact is more common.

What is the top 10 deadliest animal in the world? ›

Top 10: the most dangerous animals in the world
  • Lion. (Kills 200 people per year)
  • Hippo. (Kills 500 people per year)
  • Elephant. (Kills 600 people per year)
  • Crocodile. (Kills 1,000 people per year)
  • Scorpio. (Kills 3,300 people per year)
  • Bedbug Triatominae (Chagas disease) (Kills 10,000 people per year)
  • Dog (anger) ...
  • Snake.

What is the deadliest thing in the world? ›

1. Mosquito (780,000 deaths per year) The tiny mosquito is the most dangerous animal in the world, claiming 780,000 lives annually. These relentless insects spread destructive diseases, including malaria, dengue fever, Zika virus, and West Nile virus, primarily through their bites.

How many people were killed by hippos? ›

Accounts recording the number of human deaths per year by hippo attack range from about 500 to about 3,000. It is thought that hippo attacks on small boats are antipredator behavior, with the hippos mistaking them for crocodiles. As a result, hippos have long had a largely undeserved reputation as aggressive animals.

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