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National Invasive Species Information Center (NISIC)

The gateway to invasive species information; covering federal, state, local and international sources.
Invasive species are plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration, and whose introduction causes or is likely to cause harm.

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Slideshow of Featured Species

  • Oxygen Weed

    Has invaded New Zealand and Europe. It can inhabit freshwater lakes, dams and slow moving streams. Forms dense mats that block sunlight, thereby killing native aquatic plant and animal species, which... more

  • Whitetop

    Crowds out native species and reduces crop yields (Zouhar 2004)

  • Screwworm

    Parasite that kills livestock and wildlife, particularly cattle (CFSPH 2006)

  • Karnal Bunt

    Fungal disease that infects wheat, reducing quality and yield (Bonde et al. 1997)

Featured News and Resources

News

Read the latest invasive species research news from ScienceDaily

What's New

See what's new on NISIC's Web site

Identify

Identify species that may be invasive

Calendar and Events

Find invasive species related conferences and events