The Wisconsin Department of Natural Resources (DNR) has confirmed the emergence of cicadas in Wisconsin, specifically in the area of Lake Geneva. Photos sent by a resident on May 17 captured the newly emerged cicadas, officially identified as Brood XIII cicadas by the DNR.

Unique Cicada Species in Wisconsin

Periodical cicadas, a distinctive insect found exclusively in the eastern half of the U.S., have seven species categorized into 15 different broods or year classes. Among these, the 17-year Brood XIII is the sole one known to emerge in Wisconsin, primarily in its southernmost counties. However, neighboring states like Illinois will witness the emergence of both Brood XIII and the 13-year Brood XIX simultaneously. Remarkably, this synchronized emergence marks the first occurrence since 1803, spanning a remarkable 221 years.

Cicada Characteristics and Behavior

While cicadas are known for their deafening mating calls and post-mating nuisance as their carcasses litter the ground, it’s noteworthy that they do not pose a threat to humans as they neither bite nor sting. In fact, cicadas are consumed by some individuals, earning them the nickname tree shrimp.

Upon emergence, cicadas gather in large numbers, with densities ranging from tens to hundreds of thousands per acre. This mass emergence lasts for four to six weeks, during which cicadas feed on deciduous plants and shrubs by extracting plant fluids. Fortunately, this feeding behavior typically does not harm mature, healthy plants.

Future Emergence and Citizen Engagement

The current emergence of cicadas in southern Wisconsin is expected to continue into June. However, these insects won’t reappear in the state until 2041, according to the DNR. To facilitate tracking of cicada sightings and the co-emergence of different broods, individuals are encouraged to report sightings through the Cicada Safari app.

For more information on periodical cicadas in Wisconsin, interested parties can refer to the University of Wisconsin–Madison’s dedicated webpage on the subject.

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