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Invasive Species Resources

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Maine Department of Environmental Protection.
In 2008, the purchase of a new sticker for owners of Maine-registered watercraft was automatically combined with the watercraft registration fee. The sticker, which now reads "Stop Aquatic Hitchhikers -- Preserve Maine Waters" and is physically attached to the Maine watercraft registration, has been required since 2002 for all motorized watercraft on inland waters. Owners of non-Maine registered boats will continue to be required to purchase and affix a separate nonresident sticker. 
Maine Department of Environmental Protection.
Colorado Parks and Wildlife.
Colorado Parks and Wildlife.

Maine Department of Marine Resources.

DOI. Bureau of Land Management.
Colorado Parks and Wildlife.
Motorboats and sailboats must have an ANS Stamp prior to launching in Colorado in 2019. Boat owners are required to purchase the ANS Stamp and operators must retain proof of purchase (electronic or printed receipt) on his or her person, the motorboat or sailboat, when operating the vessel (C.R.S. 33-10.5-104.5). ​Funding contributes to prevention and management of ANS in the state. Thank you for protecting our waters and contributing to conservation in Colorado!
Colorado State University. College of Agricultural Sciences.
Colorado Weed Management Association.
Colorado State University. Colorado State Forest Service.

Maine Department of Agriculture, Conservation, and Forestry. Maine Natural Areas Program.

University of Kentucky. College of Agriculture.

Maine Department of Agriculture, Conservation, and Forestry. Maine Forest Service.

University of Kentucky. Cooperative Extension Service.
See also: Woody Ornamentals for more fact sheets.
Colorado Parks and Wildlife.
Explains state laws and regulations governing wildlife as pets, including what's legal and what's illegal to own, and why.