Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
Perccottus glenii is native to parts of Russia, China, and North Korea. This species has been introduced both intentionally and inintentionally throughout Central Asia and far Eastern Europe, and will likely become introduced and established in more parts of Europe in the near future. Climate match with the continental United States is high, especially in the Great Lakes and Mountain West states. This species has caused the reduction and displacement of multiple species in multiple freshwater habitats, and may cause changes to the trophic structure of habitats.
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High Risk
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