"Watch List" TrainingGrass Carp
Member of the Minnow (Cyprinidae) family. First introduced in the United States in Arkansas in 1600s and has since spread to 34 states.
Hemlock Woolly Adelgid
Member of the Adelgid (Adelgidae) family. First described in western North America in 1924 and first reported in 1951 near Richmond, VA. It is a true bug native to East Asia.
Purple Jewelweed
Herbaceous annual that is a member of the Touch-me-not (Balsaminaceae) family. Can be distinguished vegetatively from natives, which have alternate leaves.
Hydrilla
Submerged, rooted perennial that is a member of the Tape-grass (Hydrocharitaceae) family. This species has been listed as a noxious weed under federal law and is also prohibited under Michigan law.
Marbled Crayfish
Medium-sized member of the Freshwater Crayfish (Cambaridae) family. It originated in the pet trade industry and does not currently exist anywhere in Michigan or in the United States as a wild native population. This species is a prohibited species in the state of Michigan as of April 2020.
Mile-A-Minute Weed
Herbaceous, fast growing annual that is a member of the Buckwheat (Polygonaceae) family. It was introduced in the 1930s.
New Zealand Mudsnail
Very small member of the Mud Snail (Hydrobiidae) family. There are two genetic types of New Zealand mudsnails: Clone 1 was first discovered in Idaho in the 1980s, and has most recently been discovered in a southern Wisconsin stream. Clone 2 is in parts of the Great Lakes Region: Lake Erie near Cleveland, Lake Michigan near the Waukegan Harbor, and Lake Superior near the Duluth-Superior Harbor.
Northern Snakehead
Member of the Freshwater Perciform Fish (Channidae) family. The first report of an introduced northern snakehead was in 1997 and have been found in eight U.S states since then. Introduced intentionally by Asian food importers to establish harvestable populations for consumption. There have also been introductions by pet owners.
Parrot Feather Watermilfoil
Herbaceous, aquatic plant that is a member of the Water Milfoil (Haloragaceae) family. It is best surveyed in summer and fall and is a common water garden or aquarium plant. This species is listed on the Michigan prohibited aquatic plant list.