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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

  • Russian Knapweed

    Crowds out native species and desirable forage; toxic to horses (Zouhar 2001)

  • Japanese Climbing Fern

    Smothers native vegetation by blocking sunlight and increases fire risk by allowing fire to spread up trees along its vines (Minogue et al. 2009)

  • Bighead Carp

    Impacts not adequately known, but may "lead to reductions in populations of native species that rely on plankton for food, including all larval fishes, some adult fishes, and native mussels" (NAS... more

  • Palmer Amaranth

    One of the most economically important weeds of corn, cotton, and soybean; some populations are resistant to glyphosate and other herbicides (Ward et al. 2013)


Climate Change

Learn how climate change impacts invasives species

What's New

See what's new on NISIC's Web site


Read the latest invasive species research news from ScienceDaily

Calendar and Events

Find invasive species related conferences and events