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Invasive plants, animals and pests are taking a toll on Wisconsin’s lakes, rivers and landscapes. The DNR is working with citizens and partners to slow the spread of invasive species. Through educational outreach, strategic planning and active management we are protecting our environment and economy from invasives.

— Wisconsin DNR

State Contacts

Jennifer Feyerherm

Invasive Species Program Specialist
Ph: 608-266-6437

Bob Wakeman

AIS Program Coordinator
Ph: 262-574-2149

Kelly Kearns

Invasive Plant Coordinator - Endangered Resources
Ph: 608-267-5066

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Top Reported Species

  • Common tansy: 6,823
  • Common carp: 4,525
  • Canada thistle: 3,329
  • Spotted knapweed: 1,946
  • Phragmites (Invasive): 1,564
  • Common buckthorn: 1,095
  • Wild parsnip: 1,064
  • Garlic mustard: 977
  • Purple loosestrife: 797
  • European swamp thistle: 676

Regulated Aquatic Species

Regulated Terrestrial Species

Amur Cork Tree
Amur Honeysuckle
Amur Maple
Aquatic Forget-Me-Not
Asian Gypsy Moth
Asian Loeseneri Bittersweet
Asian Longhorned Beetle
Autumn Olive
Balfour’s Touch-Me-Not
Bell’s Honeysuckle
Bishop’s Goutweed
Black (European) Alder
Black Knapweed
Black Locust
Black (Louise’s) Swallow−Wort
Bohemian Knotweed
Broadleaved pepperweed
Brown Knapweed
Burning Bush
Butterfly Dock
Canada Thistle
Chinese (Sericea) Lespedeza
Chinese Wisteria
Chinese Yam
Colt’s Foot
Common Barberry
Common Buckthorn
Common Teasel
Creeping Bellflower
Crown Vetch
Cut−Leaved Teasel
Cypress Spurge
Dalmatian Toadflax
Dame’s Rocket
Diffuse Knapweed
Emerald Ash Borer
European Gypsy Moth
European Marsh Thistle
Feral Domestic Swine
Field Scabiosa
Fiveleaf Akebia
Garden Heliotrope
Garden Yellow Loosestrife
Garlic Mustard
Giant Hogweed
Giant Knotweed
Glossy Buckthorn
Grecian Foxglove
Hairy Willow Herb
Helleborine Orchid
Hemlock Woolly Adelgid
Brittlestem Hemp Nettle
Hill Mustard
Himalayan Blackberry
Hound’s Tongue
Hybrid Cattail
Japanese Barberry
Japanese Chaff Flower
Japanese Hedgeparsley / Erect Hedgeparsley
Japanese Honeysuckle
Japanese Hop
Japanese Knotweed
Japanese Stilt Grass
Japanese Wisteria
Jumping Worm
Leafy Spurge
Lesser Celandine
Lyme Grass
Mile−A−Minute Vine
Morrow’s Honeysuckle
Mountain Pine Beetle
Multiflora Rose
Narrow Leaf Bittercress
Narrow-Leaf Cattail
Musk Thistle
Oriental Bittersweet
Pale (European) Swallow−Wort
Plumeless Thistle
Poison Hemlock
Policeman’s Helmet
Porcelain Berry
Princess Tree
Purple Loosestrife
Queen Of The Meadow
Ribbon Grass
Rose Acacia
Russian Boar
Russian Knapweed
Russian Olive
Sawtooth Oak
Scarlet Pimpernel
Scotch Broom
Seaside Goldenrod
Siberian Elm
Siberian Peashrub
Spotted Knapweed
Spreading (Field) Hedgeparsley
Sudden Oak Death
Tall (Reed) Mannagrass
Tartarian Honeysuckle
Thousand Cankers Disease
Tree of Heaven
Tyrol Knapweed
Walnut Twig Beetle
Wavy Leaf Basket Grass
White Bedstraw
White Mulberry
White Poplar
White-nose syndrome fungal pathogen
Wild Chervil
Wild Parsnip
Wine Raspberry
Woodland Forget-me-not
Yellow Iris
Yellow Star Thistle