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.

State Contacts

Sarah LeSage

AIS Program Coordinator
Ph: 517-284-5472

Sue Tangora

Forest Health and Cooperative Programs Section Manager
Ph: 517-284-6223

Kevin Walters

AIS Coordinator
Ph: 517-284-5473

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Top Reported Species

  • Phragmites (Invasive): 43,473
  • Garlic mustard: 12,796
  • Brown marmorated stink bug: 12,133
  • Japanese knotweed: 7,005
  • Autumn olive: 6,616
  • Spotted knapweed: 6,571
  • Bush honeysuckle: 4,785
  • Purple loosestrife: 3,629
  • European swamp thistle: 3,624
  • Japanese barberry: 3,382