25 Most Invasive Creatures On Earth

Despite the fact that most living organisms on Earth live peacefully and in perfect harmony with Mother Nature, there are some creatures that are absolute predators and in constant competition with other forms of life. According to most dictionaries, an invasive species is a plant or animal that is not native to a specific location.

In other words, an introduced species that has a tendency to spread and is able to cause damage to the environment, the human economy, and human health. Some of these invasive creatures have caused the extinction of the whole entire species and have irreparable damage to a surrounding ecosystem.

With that said, don’t be fooled into thinking that these creatures are scary or even dangerous looking. Some of these creatures were actually kept as pets because they are so cute or even exotic.

However, the sad reality is that when introduced into an environment where natural predators where not present, these animals got out of control and completely took over their respective areas. From the adorable looking gray squirrel to the frightening Burmese Python these are 25 Most Invasive Creatures On Earth. If you want to see animals who are destructively dangerous, check out the 25 most dangerous animals in the world.

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Caribbean Tree Frog

20 en.wikipedia.orgSource: issg.org, Image: en.wikipedia.org

The Caribbean tree frog is a relatively small tree frog native to Puerto Rico. Their loud call is the main reason they are considered a pest, since their two-note “co-qui” can attain nearly one hundred decibels at 0.5 meters. Caribbean tree frogs are also known for having a voracious appetite and there are fears in Hawaii that endemic insect and spider species are at risk due to this frog’s unusual appetite.


Walking Catfish

19 en.wikipedia.orgSource: issg.org, Image: en.wikipedia.org

The walking catfish is native to Southeast Asia and has been introduced in many places for fish farming. The walking catfish (named for its ability to move over land) is an opportunistic feeder and can go for months without food. During a drought large numbers of walking catfish may congregate in isolated pools and consume other species, even causing their extinction.


Japanese Starfish

18 en.wikipedia.orgSource: issg.org, Image: en.wikipedia.org

Originally found in far north Pacific waters and areas surrounding Japan, Russia, North China, and Korea, the northern Pacific sea star has successfully invaded the southern coasts of Australia and has the potential to move as far north as Sydney. The sea star will eat a wide range of prey and has the potential for ecological and economic harm wherever it finds itself.


Raspberry Crazy Ant

Source: issg.org, Image: commons.wikimedia.orgSource: issg.org, Image: commons.wikimedia.org

Raspberry crazy ants have invaded native ecosystems and caused environmental damage from Hawaii to the Seychelles and Zanzibar. On Christmas Island in the Indian Ocean, they have formed multi-queen super colonies. They are also decimating the red land crab (Gecarcoidea natalis) populations. Crazy ants also prey on, or interfere in, the reproduction of a variety of arthropods, reptiles, birds, and mammals on the forest floor and canopy.


The Common Malaria Mosquito

16 en.wikipedia.orgSource: issg.org, Image: en.wikipedia.org

Anopheles quadrimaculatus (as it is known scientifically) is a mosquito that is responsible for most cases of malaria in North America. They are typically found at sites with abundant rooted aquatic vegetation, such as rice fields and adjacent irrigation ditches, freshwater marshes, and the vegetated margins of lakes, ponds, and reservoirs.

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