Discovery of invasive crayfish in the Willamette River drainage concerns biologists

The State of Crayfish in the Pacific Northwest - Larson - 2011

Invasive crayfish found in Ashland canal; could be bad news for

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Red Swamp Crayfish (Procambarus clarkii) - Species Profile

Invasive Crayfish Found In Ashland Canal; Could Be Bad News For

Invasive Crayfish Found In Ashland Canal; Could Be Bad News For

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Invasive Crayfish Found In Ashland Canal; Could Be Bad News For

PDF) Invasive crayfish in the Pacific Northwest

Musseling in: Invasives a threat to the region's waterways