Invasive Species


Crown Vetch

Queen Anne

Queen Anne's Lace

Garlic Mustard

Garlic Mustard

Invasive plant species, such as garlic mustard and honeysuckle, have a distinct competitive advantage over native plants. Without animals or insects from their place of origin to keep them in check, invasive plants can overrun native vegetation if not managed.

As such, invasive species take a tremendous toll on the landscape, economy, public health and recreation. For example, wild parsnip can cause burning and blistering of the skin. Invasives grow quickly, invading adjacent woodlands, natural areas and landscaped areas, out-competing desirable native species and negatively affecting wildlife habitat. Billions of dollars are spent each year in the United States on the control of invasive species (Wisconsin Department of Natural Resources, 2012). 

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Birds Foot (1)

Bird's-foot Trefoil


Canada Thistle

Wild parsnip
Wild Parsnip

Wisconsin’s Invasive Species Rule (NR 40)

This regulation (Wis. Adm. Code Chapter NR 40) makes it illegal for anyone to possess, introduce, transport or transfer select invasive species in Wisconsin without a permit. NR 40 classifies invasive species as “prohibited” or “restricted” and provides preventive measures to slow their spread. 

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Reporting Invasive Species

If you find an invasive species on your property and wish to report it, you can do so on the Wisconsin Department of Natural Resources Reporting webpage.

Early reports of new populations allow for more rapid response before they spread.





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