Invasive Species Proposed Classification Table

• Click on a heading in the blue rows to view that category's assessment summary table.
• Click on a species common name which contains a link to view that species factsheet. Those links with an asterik (*) will exit the DNR web site.
• Click on the appropriate map icon to view available distribution information.
• Click on the red and blue map icon to view a map of restricted and prohibited areas for the specified species.
• You may also view a photo gallery for those species available by clicking the camera icon.

Please note that all Literature Reviews and Group Rating Forms are PDF files. All links will open in a new window.

TERRESTRIAL PLANTS [ View Comment Options ]
Recommended Category/Classification	Common Name	Species and Genus	Notes	Literature Review	SAG Group Rating Form
Prohibited	Porcelain berry	Ampelopsis brevipedunculata	Includes the variegated cultivar	Click Here	Click Here
	Wild chervil	Anthriscus sylvestris		Click Here	Click Here
	Hill mustard	Bunias orientalis		Click Here	Click Here
	Yellow star thistle	Centaurea solstitialis		Click Here	Click Here
	Poison hemlock	Conium maculatum		Click Here	Click Here
	Scotch broom	Cytisus scoparius		Click Here	Click Here
	Chinese yam	Dioscorea oppositifolia		Click Here	Click Here
	Hairy willow herb	Epilobium hirsutum		Click Here	Click Here
	Giant hogweed	Heracleum mantegazzianum		Click Here	Click Here
	Perennial pepperweed	Lepidium latifolium		Click Here	Click Here
	Sericea lespedeza	Lespedeza cuneata = Lespedeza sericea		Click Here	Click Here
	Japanese honeysuckle	Lonicera japonica		Click Here	Click Here
	Japanese stilt grass	Microstegium vimineum		Click Here	Click Here
	Princess tree	Paulownia tomentosa		Click Here	Click Here
	Mile-a-minute vine	Polygonum perfoliatum		Click Here	Click Here
	Giant knotweed *	Polygonum sacchalinense = Fallopia sacchalinense	Includes hybrids	Click Here	Click Here
	Kudzu	Pueraria montana = Pueraria lobata		Click Here	Click Here
	Sawtooth oak	Quercus acutissima		Click Here	Click Here
	Wineberry	Rubus phoenicolasius		Click Here	Click Here
	Spreading hedge parsley	Torilis arvensis		Click Here	Click Here
	Pale swallow-wort	Vincetoxicum rossicum = Cynanchum rossicum		Click Here	Click Here
Restricted/Prohibited	Celandine	Chelidonium majus	Restricted south of Highway 64. Prohibited north of Highway 64	Click Here	Click Here
	European marsh thistle	Cirsium palustre	Restricted east of Highway 13 and north of Highway 29, including Door County. Prohibited elsewhere	Click Here	Click Here
	Tall manna grass	Glyceria maxima	Restricted east of a line formed by State Highway 22 from Oconto to Arlington. Then State Highway 51 from Arlington to the IL state line. Prohibited elsewhere	Click Here	Click Here
	Japanese hops	Humulus japonicus	Restricted only in Grant County. Prohibited elsewhere	Click Here	Click Here
	Lyme grass	Leymus arenarius = Elymus arenarius	Restricted in Door, Kewaunee, Manitowoc, Sheboygan, and Racine Counties. Prohibited elsewhere	Click Here	Click Here
	Amur honeysuckle	Lonicera maackii	Restricted South of Highway 21 from LaCrosse to Wautoma and State Highway 22 from Wautoma to Oconto. Prohibited elsewhere	Click Here	Click Here
	Japanese hedge-parsley	Torilis japonicus	Restricted South of the line formed by state Highway 21 from LaCrosse to Coloma, north on state Highway 51 to Heafford Junction, east on state Highway 8 to the Michigan state. Prohibited elsewhere	Click Here	Click Here
	Black swallowwort	Vincetoxicum nigrum = Cynanchum louiseae	Restricted South and West of a line formed by Interstate 90 from LaCrosse to Madison and 94 from Madison to Milwaukee. Prohibited elsewhere	Click Here	Click Here
Restricted	Tree-of-Heaven	Ailanthus altissima		Click Here	Click Here
	Garlic mustard	Alliaria petiolata		Click Here	Click Here
	Creeping Bellflower *	Campanula rapunculoides		Click Here	Click Here
	Plumeless thistle	Carduus acanthoides		Click Here	Click Here
	Musk thistle	Carduus nutans		Click Here	Click Here
	Oriental bittersweet	Celastrus orbiculatus = Celastrus orbiculata	Permits needed for some cut flower growers	Click Here	Click Here
	Spotted knapweed	Centaurea biebersteinii = Centaurea stoebe		Click Here	Click Here
	Canadian thistle	Cirsium arvense		Click Here	Click Here
	Hound’s tongue	Cynoglossum officinale		Click Here	Click Here
	Cut-leaved teasel	Dipsacus laciniatus		Click Here	Click Here
	Common teasel	Dipsacus sylvestris = Dipsacus fullonum subsp. sylvestris		Click Here	Click Here
	Russian olive *	Elaeagnus angustifolia		Click Here	Click Here
	Autumn olive *	Elaeagnus umbellata		Click Here	Click Here
	Helliborine orchid	Epipactis helleborine		Click Here	Click Here
	Cypress spurge *	Euphorbia cyparrissias		Click Here	Click Here
	Leafy spurge	Euphorbia esula		Click Here	Click Here
	Glossy buckthorn	Frangula alnus = Rhamnus frangula	including the Columnaris (tall hedge) cultivar but excluding the cultivars Asplenifolia and Fineline (Ron Williams)	Click Here	Click Here
	Hemp nettle	Galeopsis tetrahit		Click Here	Click Here
	Dame's rocket	Hesperis matronalis		Click Here	Click Here
	European bush honeysuckles	Lonicera tactarica, L. morrowii, L. bella		Click Here	Click Here
	Purple loosestrife	Lythrum salicaria		Click Here	Click Here
	Wild parnsip	Pastinaca sativa	exemption for garden vegetable needed	Click Here	Click Here
	Phragmites, Common reed	Phragmites australis		Click Here	Click Here
	Japanese knotweed	Polygonum cuspidatum = Fallopia japonica	includes hybrids	Click Here	Click Here
	Common buckthorn	Rhamnus cathartica		Click Here	Click Here
	Multiflora rose	Rosa multiflora		Click Here	Click Here
	Common tansy	Tanacetum vulgare	except the cultivars 'Aureum' and 'compactum'	Click Here	Click Here
	Narrow-leaf cattail	Typha angustifolia		Click Here	Click Here
	Cattail hybrid *	Typha x glauca		Click Here	Click Here
Caution	Blackberry lily	Belamcanda chinensis		Click Here	Click Here
Non-Restricted	Hoary alyssum	Berteroa incana		Click Here	Click Here
	Scotch pine	Pinus sylvestris		Click Here	Click Here
	Callery pear	Pyrus calleryana		Click Here	Click Here
Pending	Reed canary grass	Phalaris arundinacea		Click Here	Click Here
AQUATIC PLANTS [ View Comment Options ]
Category/Classification	Common Name	Species and Genus	Notes	Literature Review	SAG Group Rating Form
Prohibited	Fanwort	Cabomba caroliniana		Click Here	Click Here
	Australian swamp crop/New Zealand pygmyweed	Crassula helmsii		Click Here	Click Here
	Cylindro (cyanobacteria)	Cylindrospermopsis raciborskii		Click Here	Click Here
	Didymo, Rock snot	Didymosphenia geminata		Click Here	Click Here
	Brazilian Waterweed	Egeria densa		Click Here	Click Here
	Hydrilla	Hydrilla verticillata		Click Here	Click Here
	European frogbit	Hydrocharis morsus-ranae		Click Here	Click Here
	Oxygen-weed, African elodea, African waterweed	Lagarosiphon major		Click Here	Click Here
	Parrot feather	Myriophyllum aquaticum		Click Here	Click Here
	Brittle (Lesser, Bushy, Slender, Spiny, Naid) waternymph	Najas minor		Click Here	Click Here
	Starry stonewort (alga)	Nitellopsis obtusa		Click Here	Click Here
	Yellow floating heart	Nymphoides peltata		Click Here	Click Here
	Golden alga	Prymneisum parvum		Click Here	Click Here
	Novel cyanobacteria of order Stigonematales	Stigonematales spp.		Click Here	Click Here
	Water chestnut	Trapa natans		Click Here	Click Here
	(no common name)	Ulva (Enteromorpha) spp.		Click Here	Click Here
Restricted	Flowering rush	Butomus umbellatus		Click Here	Click Here
	Eurasian water milfoil + hybrid water milfoil	Myriophyllum spicatum + hybrids		Click Here	Click Here
	Curly-leaf pondweed	Potamogeton crispus		Click Here	Click Here
Caution	Mosquito fern, water velvet	Azolla pinata		Click Here	Click Here
	Pond water-starwort	Callitriche stagnalis		Click Here	Click Here
	Water hyacinth	Eichhornia crassipes		Click Here	Click Here
	East Indian hygrophilia, Indian swampweed	Hygrophila polysperma		Click Here	Click Here
	Water spinach, Swamp morning-glory	Ipomoea aquatica		Click Here	Click Here
	Dotted duckweed	Landoltia punctata		Click Here	Click Here
	Limnophila, Asian marshweed	Limnophila sessiliflora		Click Here	Click Here
	(no common name, plant)	Limnobium spongia		Click Here	Click Here
	Water shamrock, European waterclover	Marsilea quadrifolia		Click Here	Click Here
	Watercress *	Nasturtiumofficinale/ Rorippa nasturtium-aquaticum		Click Here	Click Here
	Ducklettuce	Ottelia alismoides		Click Here	Click Here
	(no common name, alga)	Pfiesteria spp.		Click Here	Click Here
	Water lettuce	Pistia stratiotes		Click Here	Click Here
	Salvinia species	Salvinia spp		Click Here	Click Here
Non-Restricted	Water soldiers	Stratiotes aloides		Click Here	Click Here
	Killer alga	Caulerpa taxifolia		Click Here	Click Here
VERTEBRATES [ View Comment Options ]
Category/Classification	Common Name	Species and Genus	Notes	Literature Review	SAG Group Rating Form
Prohibited *	Mute Swan	Cygnus olor	Exemption under NR169- permitted if neutered	Click Here	Click Here
	Monk or Quaker parakeet or parrot	Myiopsitta monachus	Legally obtained pets may be possessed, transported, or transferred	Click Here	Click Here
	Feral domestic swine	Sus domestica		Click Here	Click Here
	Russian boar & other wild swine	Sus scrofa	Permitted with DNR permit under NR 169	Click Here	Click Here
Restricted	Red-eared slider with a carapace (top shell) length of less than 4 inches	Trachemys scripta elegans	Carapace (top shell) length greater than 4 inches are legal	Click Here	Click Here
Caution	European goldfinch	Carduelis carduelis		Click Here	Click Here
	Great tit	Parus major		Click Here	Click Here
	Eurasian tree sparrow	Passer montanus		Click Here	Click Here
	Eurasian collared-dove	Streptopelia decaocto		Click Here	Click Here
Non-Restricted	House finch	Carpodacus mexicanus		Click Here	Click Here
	Pigeon (Rock dove)	Columba livia		Click Here	Click Here
	Stone (Beech) marten	Martes foina		Click Here	Click Here
	House mouse	Mus musculus		Click Here	Click Here
	English (House) sparrow	Passer domesticus		Click Here	Click Here
	Norway rat	Rattus norvegicus		Click Here	Click Here
	Ring-necked pheasant	Phasianus colchicus		Click Here	Click Here
	European starling	Sturnus vulgaris		Click Here	Click Here
* All other non-native mammals, birds, reptiles & amphibians are prohibited except: 1) domestic animals, but not including domestic animal species specifically listed above that have become feral, 2) nonnative wild animals, possession of which is authorized by a license issued under ch. 169, Stats., but not including nonnative wild animals that are harmful wild animals, 3) non-viable terrestrial & aquatic vertebrates, and 4) legally obtained nonnative wild animals that are pets may be possessed, transported or transferred without a permit.
TERRESTRIAL INVERTEBRATES & PLANT DISEASE-CAUSING MICROORGANISMS [ View Comment Options ]
Category/Classification	Common Name	Species and Genus	Notes	Literature Review	SAG Group Rating Form
Prohibited	Hemlock woolly adelgid	Adelges tsugae		Click Here	Click Here
	Emerald Ash Borer	Agrilus planipennis		Click Here	Click Here
	Crazy worms	Amynthas & Amynthes spp.		Click Here	Click Here
	Asian longhorned beetle	Anaplophora glabripennis		Click Here	Click Here
	Scale associated with Beech Bark Disease	Cryptococcus fagisuga		Click Here	Click Here
	Asian gypsy moth	Lymantria dispar (Asian race)		Click Here	Click Here
	Sudden oak death pathogen	Phytophthora ramorum		Click Here	Click Here
Restricted	European gypsy moth	Lymantria dispar (European race)		Click Here	Click Here
Caution	Orange-banded arion (slug)	Arion fasciatus		Click Here	Click Here
	Garden arion (slug)	Arion hortensis		Click Here	Click Here
	Chocolate arion (slug)	Arion rufus		Click Here	Click Here
	Dusky arion (slug)	Arion subfuscus		Click Here	Click Here
	Brown gardensnail	Cornu aspersum		Click Here	Click Here
	White pine blister rust	Cronartium ribicola		Click Here	Click Here
	Meadow slug	Deroceras leave		Click Here	Click Here
	Gray fieldslug	Deroceras reticulatum		Click Here	Click Here
	Multicolored Asian Ladybeetle *	Harmonia axyridis		Click Here	Click Here
	Escargot (snail)	Helix pomatia		Click Here	Click Here
	Yellow gardenslug	Limax flavus		Click Here	Click Here
	Giant gardenslug	Limax maximus		Click Here	Click Here
	Cellar glass-snail	Oxychilus cellarius		Click Here	Click Here
	Dark-bodied glass-snail	Oxychilus draparnaudi		Click Here	Click Here
	Southern flatcoil (snail)	Polygyracereolus cereolus		Click Here	Click Here
	Butternut canker pathogen	Sirococcus clavigigenti juglandacearum		Click Here	Click Here
Still Under Consideration (pending WCIS approval January 30, 2008)	Earthworms	Acanthodrilidae, Lumbricidae, Megascloecidae	Pending further discussion	Click Here	Click Here
	Winter moth	Operophtera brumata	GRF will be developed after next SAG meeting	Click Here	Click Here
	Sirex wood wasp	Sirex noctilio	GRF will be developed after next SAG meeting	Click Here	Click Here
FISH AND AQUATIC INVERTEBRATES [ View Comment Options ]
Category/Classification	Common Name	Species and Genus	Notes	Literature Review	SAG Group Rating Form
Prohibited Includes all other nonnative fish and nonnative crayfish except: a) Established nonnative fish species and established nonnative crayfish species b) Fish species in the aquarium trade c) Fish species in the aquaculture trade	Faucet Snail	Bithynia tentaculata	The faucet snail was added to the list of prohibited species after the SAG meeting at the recommendation of Pam Thiel from the Fish & Wildlife Service. A Species Assessment form was not completed for the faucet snail.	Click Here	Click Here
	Spiny water flea	Bythotrephes cederstroemi		Click Here	Click Here
	Fish hook water flea	Cercopagus pengoi		Click Here	Click Here
	Snakehead family	Channa sp.		Click Here	Click Here
	Asian clam	Corbicula fluminea		Click Here	Click Here
	Grass carp	Ctenopharyngodon idella	Aquaculture industry would like to allow limited use of triploid grass carp, possibly allowing only individually certified and marked fish.	Click Here	Click Here
	Red shiner	Cyprinella lutrensis		Click Here	Click Here
	Water flea	Daphnia lumholtzi		Click Here	Click Here
	Chinese mitten crab	Eriocheir sinensis		Click Here	Click Here
	Western mosquitofish	Gambusia affinis	This is viable in Wisconsin. It is sold for aquarium use. Concerns exist about ecological risks. This species also is often intermingled with native minnow species imported from out-of-state fish farms for use as bait. Prohibition would create hardship for those bait import businesses and possibly limit the availability of live bait.	Click Here	Click Here
	Eastern mosquitofish	Gambusia holbrooki	This is viable in Wisconsin. It is sold for aquarium use. Concerns exist about ecological risks. This species also is often intermingled with native minnow species imported from out-of-state fish farms for use as bait. Prohibition would create hardship for those bait import businesses and possibly limit the availability of live bait.	Click Here	Click Here
	Bloody shrimp	Hemimysis anomala		Click Here	Click Here
	Silver carp	Hypophthalmichthys molitrix		Click Here	Click Here
	Bighead carp	Hypophthalmichthys nobilis		Click Here	Click Here
	Blue catfish	Ictalurus furcatus	This species is listed among those species currently held on one or more fish farms, but concerns exist about ecological risks.	Click Here	Click Here
	Black carp	Mylopharyngodon piceus		Click Here	Click Here
	New Zealand mud snail	Potamopyrgus marmoratus		Click Here	Click Here
	Zander	Sander lucioperca		Click Here	Click Here
	Rudd	Scardinius erythrophthalmus		Click Here	Click Here
	Tench	Tinca tinca		Click Here	Click Here
Restricted Includes nonnative: a) Fish species in the aquarium trade b) Fish species in the aquaculture trade c) Established nonnative fish species and established nonnative crayfish species	White sturgeon	Acipenser ruthenus	This is viable in Wisconsin. It is sold for aquarium use. Concerns exist about ecological risks.	Click Here	Click Here
	Alewife	Alosa psuedoharengus	Already present in the Great Lakes.	Click Here	Click Here
	Goldfish	Carassium auratus	Aquarium species that is viable in Wisconsin	Click Here	Click Here
	Chinese mystery snail	Cipangopaludina chinensis	The Chinese mystery snail was changed from prohibited to restricted after the Council meeting since it is already widely distributed in WI waters.	Click Here	Click Here
	Common carp, except koi	Cyprinus carpio	Widespread in Wisconsin, but not welcome where it does not yet occur	Click Here	Click Here
	Koi carp	Cyprinus carpio	Koi is a form of common carp that is widely used in ponds.	Click Here	Click Here
	Quagga mussel	Dreissena bugensis		Click Here	Click Here
	Zebra mussel	Dreissena polymorpha	SAG members had included zebra mussels in the prohibited category, but since this species is already fairly widespread in over 100 WI waters, DNR staff decided to place zebra mussels in the restricted category.	Click Here	Click Here
	Threespine stickleback	Gasterosteus aculeatus	Already present in the Great Lakes.	Click Here	Click Here
	Ruffe	Gymnocephalus cernuus	Already present in the Great Lakes.	Click Here	Click Here
	Ide or Orfe	Leuciscus idus	This is viable in Wisconsin. It is sold for aquarium use. Concerns exist about ecological risks.	Click Here	Click Here
	Redear sunfish	Lepomis microlophus	Currently listed aquaculture species	Click Here	Click Here
	Weather loach	Misgurnus anguillicaudatus	This is viable in Wisconsin. It is sold for aquarium use. Concerns exist about ecological risks.	Click Here	Click Here
	White perch	Morone americana	Already present in the Great Lakes.	Click Here	Click Here
	Chinese hi-fin banded shark	Myxocyprinus asiaticus	Aquarium species that is viable in Wisconsin	Click Here	Click Here
	Round Goby	Neogobius melanostomus	Already present in the Great Lakes.	Click Here	Click Here
	Rainbow trout	Onchorynchus gairneri	Currently listed aquaculture species	Click Here	Click Here
	Pink salmon	Onchorynchus gorbuscha	Currently listed aquaculture species	Click Here	Click Here
	Coho salmon	Onchorynchus kisutch	Currently listed aquaculture species	Click Here	Click Here
	Chinook salmon	Onchorynchus tshawytsha	Currently listed aquaculture species	Click Here	Click Here
	Rusty crayfish	Orconectes rusticus		Click Here	Click Here
	Rainbow smelt	Osmerus mordax	Already present in the Great Lakes.	Click Here	Click Here
	Sea lamprey	Petromyzon marinus	Already present in the Great Lakes.	Click Here	Click Here
	Tubenose goby	Proterorhinus marmoratus	Already present in the Great Lakes.	Click Here	Click Here
	Bitterling	Rhodeus sp.		Click Here	Click Here
	Atlantic salmon	Salmo salar	Currently listed aquaculture species	Click Here	Click Here
	Brown trout	Salmo trutta	Currently listed aquaculture species	Click Here	Click Here
	Tiger trout	Salvelinus fontinalis x Salmo trutta		Click Here	Click Here
	Tilapia	Tilapia sp.	Currently listed aquaculture species	Click Here	Click Here
	Arctic char	Thymallus arcticus	Currently listed aquaculture species	Click Here	Click Here
	Species that cannot survive and reproduce in Wisconsin.