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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. Learn what determines if a species is invasive.

Slideshow of Featured Species

  • Screwworm

    Parasite that kills livestock and wildlife, particularly cattle (CFSPH 2012)

  • Dalmatian Toadflax

    Crowds out native species (Wilson et al. 2005)

  • Cactus Moth

    Feeds on prickly pear cacti (species in the genus Opuntia) (Johnson and Stiling 1998)

  • Princess Tree

    Grows and produces seeds rapidly, and displaces native species in disturbed areas (Innes 2009)

Featured

Climate Change

Learn how climate change impacts invasives species

What's New

See what's new on NISIC's Web site

News

Read the latest invasive species research news from ScienceDaily

Calendar and Events

Find invasive species related conferences and events