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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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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 - Know Your Invasives: Rusty Crayfish

Google. YouTube; University of Wisconsin-Madison. Center for Limnology.
YouTube - Kudzu Bug Spreads Across the Southeast
Google. YouTube; University of Georgia. College of Agricultural and Environmental Sciences.
YouTube - Royal Paulownia: A Royal Pain

Google. YouTube; University of Maryland. Home & Garden Information Center.
YouTube - The Silverleaf Whitefly Problem in Georgia

Google. YouTube; University of Georgia. 
YouTube - Tree of Heaven - Invasive Plant in Maryland

Google. YouTube; University Maryland. Home and Garden Information Center.
YouTube - What Will Round Gobies Do to Great Lakes Streams?
Google. YouTube; University of Wisconsin Sea Grant.