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

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A Brief Guide to Kentucky's Non-Native, Invasive Species, Common Weeds, and Other Unwanted Plants (PDF | 4.7 MB)
Louisville Water Company.
YouTube - Alewife
Google. YouTube; Vermont Fish & Wildlife Department.
YouTube - Canada Thistle, Identification of the Wisconsin Invasive Species Cirsium arvense

Google. YouTube; University of Wisconsin Extension.
YouTube - Common Teasel Identification
Google. YouTube; University of Wisconsin - Madison. Extension.
YouTube - Hemlock Woolly Adelgid

Google. YouTube; New York Department of Environmental Conservation.
YouTube - Invasive clams cause concern in Owasco Lake
Google. YouTube; New York Sea Grant.
YouTube - Viral Hemorrhagic Septicemia in Conesus Lake
Google. YouTube; New York Department of Environmental Conservation.