The Walking Catfish have upset the balance of the ecosystems and hurt local economies.

Centuries ago, explorers brought hogs to the Americas as a food source. Some of these boars made it...

Sea Lamprey have invaded the Great Lakes where they have killed off native species and harmed the...

Starlings have glossy feathers and are aggressive competitors for nesting sites. Native to Europe...

Termites can invade homes and cause a lot of damage. Termites that invade new countries can damage...