invasive species

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Mexican fruit fly

invasive species: Burmese python (Python bivittatus)

Rummaging for grain

brown tree snake

The video thumbnail image shows two hands holding zebra and quagga mussels, superimposed above a clear body of water. White question marks appear in the upper left corner.

sea lamprey: mouth

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invasive species: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Last Updated: May 27, 2025

News •

Researchers alarmed over declining bird populations • May 25, 2025, 12:13 AM ET (CBS)

Facts

Also Known As	exotic species • alien species

Photos and Videos

Mexican fruit fly

invasive species: Burmese python (Python bivittatus)

Rummaging for grain

brown tree snake

sea lamprey: mouth

bighead carp and silver carp

The video thumbnail image shows two hands holding zebra and quagga mussels, superimposed above a clear body of water. White question marks appear in the upper left corner.

Problems caused by the invasive kudzu vine

Know about invasive species and the importance of knowledge in fighting an invasion

How do lionfish affect the ecosystems they invade?

Fishing for Chinese mitten crabs in Germany

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Topics

weed introduced species species dispersion fairy ring

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