The World’s Deadliest Animals You Don’t Know About

Published March 19, 2021
Updated November 8, 2023

Everyone knows about sharks and snakes, but there is an abundance of other dangerous animals on Earth.

Some animals continuously steal the top spots on various lists of the world’s dangerous and deadliest animals. While great white sharks, cobras, and ferocious African felines may be experienced predators, there are just as many little-known yet equally threatening animals lurking in the wild:

World’s Deadliest Animals: Asian Giant Hornet

Deadliest Animals On Earth

Once you notice the size of the Asian giant hornet—nearly as big as one’s thumb—you’ll know why it needed to be included on this list. The hornet’s wingspan is bigger than that of some hummingbirds, and can fly at an impressive 25 miles per hour–even faster when in a hive. This huge hornet, also referred to as the Japanese giant hornet, is responsible for numerous deaths in Japan every year.

To fully grasp the size of the Asian Giant Hornet, check out this video of a man’s “pet” hornet:

A single sting from the Asian giant hornet is enough to kill a grown man. Significantly more potent than other species of wasps and hornets, the Asian giant hornet’s venom contains cytolytic peptides that literally tear apart cell tissue on a molecular scale.

These hornets have quarter-inch-long stingers that—when combined with the venom—deliver a devastatingly painful sting.

This popular video shows 300 Asian giant hornets decimating nearly 30,000 bees:

And more videos of the Asian giant hornet:

Tse Tse Fly

Deadliest Animals Tseste Fly

Source: Pets Foto

The Tsetse fly is a bloodsucking insect that transmits the world’s nastiest diseases, making it one of the most dangerous animals in the world. A true threat to humans, tsetse flies primarily infect people with the sleeping disease. These nasty bugs also pose a threat to animals by spreading animal trypanosomiasis, also known as nagana.

Though they look similar to other fly species, tsetse flies differentiate themselves by surviving solely upon the blood of other mammals.

Tsetse flies have a life span of one to three months, and suck blood daily–usually during peak warm hours–to stay alive. The fly’s fossils have been found in the Florissant Fossil Beds in Colorado, leading researchers to believe that in addition to being quite dangerous, they are also extremely old.

The human sleeping sickness plagues the populations of 36 sub-Saharan African countries where tsetse flies live and infect the masses.

Those affected by African trypanosomiasis can expect prolonged infections followed by failure of the central nervous system, a slew of neurological problems, and other uncomfortable circumstances. Due to the severity of the illness, a large tsetse fly population even prevents humans from settling in some geographic areas. Multiple sleeping sickness epidemics have occurred in the past century

Savannah Cox
Savannah Cox holds a Master's in International Affairs from The New School as well as a PhD from the University of California, Berkeley, and now serves as an Assistant Professor at the University of Sheffield. Her work as a writer has also appeared on DNAinfo.
John Kuroski
John Kuroski is the editorial director of All That's Interesting. He graduated from New York University with a degree in history, earning a place in the Phi Alpha Theta honor society for history students. An editor at All That's Interesting since 2015, his areas of interest include modern history and true crime.
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Cox, Savannah. "The World’s Deadliest Animals You Don’t Know About.", March 19, 2021, Accessed May 19, 2024.