Ecological Risk Screening Summary - Virile crayfish (Orconectes virilis) - High Risk

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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.

Orconectes virilis is a crayfish native to the northern US that has been introduced to other parts of the contiguous US, Mexico, and Europe. Its introductions have resulted in declines of native macrophytes, macroinvertebrates, and fish. The species is known to carry and/or be susceptible to two OIE-reportable diseases. High climate match and history of invasiveness argues for a high risk of spread and impact of this species. Overall risk is high.

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The Fish and Aquatic Conservation program leads aquatic conservation efforts for the U.S. Fish and Wildlife Service. We are committed to tackling the nation’s highest priority aquatic conservation and recreational challenges to conserve, restore, and enhance fisheries for future generations.
Aquatic invasive species cause tremendous harm to our environment, our economy, and our health. They can drive out and eat native plants and wildlife, spread diseases, and damage infrastructure. We work to protect our waterways and the communities that depend on them from the threat of invasive...
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