Skip to main content


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

Katie Grzesiak

Terrestrial Invasive Species Coordinator
Ph: 231-492-7811

Lucas Nathan

Aquatic Invasive Species Coordinator
Ph: 517-599-9323

Robert Miller

Invasive Species Prevention and Response Specialist
Ph: 517-614-0454

(View All)

Top Reported Species

  • Phragmites (Invasive): 66,741
  • Garlic mustard: 20,363
  • Autumn olive: 17,408
  • Spotted knapweed: 16,323
  • Brown marmorated stink bug: 13,308
  • Japanese knotweed: 13,222
  • Purple loosestrife: 11,430
  • Japanese barberry: 9,253
  • Common buckthorn: 8,921
  • Bush honeysuckle: 7,684