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These are the 5 costliest invasive species, causing billions in damages

The impact from all invasive species cost the global economy at least $1 trillion since 1970

a cat with a bird in its mouth

Invasive species racked up an economic toll topping $1 trillion from 1970 to 2017, new research suggests. Cats are among the costliest invasive species because of their toll on wildlife, including birds.

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By Jonathan Lambert

- More than 2 years ago

Read another version of this article at Science News Explores

Invasive species can wreak havoc on local ecosystems.