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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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Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes - Brazilian Waterweed
Lake Stewards of Maine.
Special Note: Formerly known as the Maine Volunteer Lake Monitoring Program.
Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes - Curly-Leaf Pondweed
Lake Stewards of Maine.
Special Note: Formerly known as the Maine Volunteer Lake Monitoring Program.
Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes - Eurasian Water-Milfoil
Lake Stewards of Maine.
Special Note: Formerly known as the Maine Volunteer Lake Monitoring Program.
Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes - Hydrilla
Lake Stewards of Maine.
Special Note: Formerly known as the Maine Volunteer Lake Monitoring Program.
Maine's Interactive Field Guide to Aquatic Invaders and Their Native Look Alikes - Water Chestnut
Lake Stewards of Maine.
Special Note: Formerly known as the Maine Volunteer Lake Monitoring Program.
Noxious Weed Information - Canada Thistle
Colorado Weed Management Association.
Noxious Weed Information - Dalmatian Toadflax
Colorado Weed Management Association.
Noxious Weed Information - Diffuse Knapweed
Colorado Weed Management Association.
Noxious Weed Information - Eurasian Watermilfoil
Colorado Weed Management Association.
Noxious Weed Information - Giant Salvinia
Colorado Weed Management Association.
Noxious Weed Information - Hoary Cress (Whitetop)
Colorado Weed Management Association.
Noxious Weed Information - Houndstongue
Colorado Weed Management Association.
Noxious Weed Information - Hydrilla
Colorado Weed Management Association.
Noxious Weed Information - Leafy Spurge
Colorado Weed Management Association.
Noxious Weed Information - Medusahead
Colorado Weed Management Association.
Noxious Weed Information - Purple Loosestrife
Colorado Weed Management Association.
Noxious Weed Information - Russian Knapweed
Colorado Weed Management Association.
Noxious Weed Information - Russian Olive
Colorado Weed Management Association.
Noxious Weed Information - Salt Cedar
Colorado Weed Management Association.
Noxious Weed Information - Scotch Thistle
Colorado Weed Management Association.