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Wisconsin

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

Resources

State Contacts

Jennifer Feyerherm

Invasive Species Program Specialist
jennifer.feyerherm@wisconsin.gov
Ph: 608-266-6437

Bob Wakeman

AIS Program Coordinator
robert.wakeman@wisconsin.gov
Ph: 262-574-2149

Kelly Kearns

Invasive Plant Coordinator - Endangered Resources
kelly.kearns@wisconsin.gov
Ph: 608-267-5066

(View All)

Top Reported Species

  • Common tansy: 6,823
  • Common carp: 4,525
  • Canada thistle: 3,329
  • Spotted knapweed: 1,946
  • Phragmites (Invasive): 1,560
  • Common buckthorn: 1,095
  • Wild parsnip: 1,064
  • Garlic mustard: 977
  • Purple loosestrife: 797
  • European swamp thistle: 676

Recent Observations

Regulated Aquatic Species

Alewive
Anchored water hyacinth
Arctic char
Asian clam
Asian marshweed
Atlantic salmon
Banded mystery snail
Bighead carp
Bitterling
Black carp
Bloody shrimp
Brazilian waterweed
Brittle Water-Nymph
Brown trout
Chinese hi-fin banded shark
Chinese mitten crab
Chinese mystery snail
Chinook salmon
Coho salmon
Common carp
Curly−leaf pondweed
Cylindro (cyanobacteria)
Didymo or rock snot
Ducklettuce
Eastern mosquitofish
Eurasian watermilfoil
European frogbit
European valve snail
Fanwort, Carolina Fanwort
Faucet snail
Fishhook waterflea
Floating marsh pennywort
Flowering rush
Giant reed
Giant Salvinia
Golden alga
Golden mussel
Goldfish
Graceful cattail
Grass carp
Hawaii arrowhead
Hydrilla
Ide
Indian Swampweed
Japanese mystery snail
Java waterdropwort
Killer algae
Killer Shrimp
Koi carp (Common Carp)
Malaysian trumpet snail
Mosquito fern
Mudmat
New Zealand mudsnail
New Zealand pygmyweed (Swamp stonecrop)
Nutria
Oxygen Weed
Parrot feather
Pink salmon
Quagga mussel
Rainbow smelt
Rainbow trout
Red shiner
Red swamp crayfish
Redear sunfish
Round goby
Rudd
Ruffe
Rusty crayfish
Sacred Lotus
Sea lamprey
Silver carp
Snakehead family
Southern cattail
Spiny naiad
Spiny waterflea
Starry stonewort
Sterlet
Tench
Three-spine stickleback
Tiger trout
Tilapia
Tubenose Goby
Ulva (Enteromorpha)
Wanded loosestrife
Water chestnut
Water flea
Water hyacinth
Water lettuce
Water Soldier
Water Spinach
Weather loach
Western mosquitofish
White perch
Yellow floating heart
Yellow iris
Zander
Zebra mussel

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
Celandine
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
Johnsongrass
Jumping Worm
Kudzu
Leafy Spurge
Lesser Celandine
Lyme Grass
Medusahead
Mile−A−Minute Vine
Moneywort
Morrow’s Honeysuckle
Mountain Pine Beetle
Multiflora Rose
Narrow Leaf Bittercress
Narrow-Leaf Cattail
Musk Thistle
Nutria
Oriental Bittersweet
Pale (European) Swallow−Wort
Phragmites
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
Tansy
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
Wormwood
Yellow Iris
Yellow Star Thistle