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U.S. Department of Agriculture
National Invasive Species Information Center

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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  • Spiny Water Flea

    Has caused a decline in the population of zooplankton as a result of predation (Vanderploeg et al. 2002); may also compete with some native species, such as perch and small crustaceans (Branstrator... more

  • Burmese Python

    Preys on native species, some of which are endangered (such as the Key Largo woodrat, Neotoma floridana smalli); may also compete with threatened native species, such as the indigo snake (Drymarchon... more

  • Whitetop

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

  • Bullfrog

    Competes with and preys on native species (Ficetola et al. 2007)

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