An invasive species is one that is not native and whose introduction causes harm, or is likely to cause harm to Michigan’s economy, environment, or human health.

Many non-native species in Michigan, including fruits, vegetables, field crops, livestock and domestic animals, are important to our economy and lifestyle. Most non-native species are not harmful and may provide economic benefits. Invasive species cause harm when they out-compete native species by reproducing and spreading rapidly in areas where they have no natural predators and change the balance of the ecosystems we rely on.

Resources

State Contacts

Katie Grzesiak

Terrestrial Invasive Species Coordinator
GrzesiakK1@michigan.gov
Ph: 231-492-7811

Lucas Nathan

Aquatic Invasive Species Coordinator
nathanl@michigan.gov
Ph: 517-599-9323

Robert Miller

Invasive Species Prevention and Response Specialist
millerr35@michigan.gov
Ph: 517-614-0454

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Top Reported Species

Phragmites (Invasive)	66,793
Garlic mustard	20,395
Autumn olive	17,436
Spotted knapweed	16,324
Brown marmorated stink bug	13,310
Japanese knotweed	13,245
Purple loosestrife	11,459
Japanese barberry	9,260
Common buckthorn	8,961
Bush honeysuckle	7,710

Recent Observations

Japanese knotweed in Kalamazoo County, MI on April 16, 2024
Japanese knotweed in Kent County, MI on April 16, 2024
Jumping worm in Ingham County, MI on April 16, 2024
Japanese knotweed in Newaygo County, MI on April 16, 2024
Autumn olive in Kent County, MI on April 16, 2024

Michigan