13-year, 17-year cicadas to return to Illinois, Indiana this spring

CHICAGO (CBS) — During the dog days of summer from July through September, and even into October, annual dog-day cicadas provide a twilight lullaby to the Chicago area and well beyond – and can often be heard during the day too.

But the annual cicadas will not be alone this year. Two separate broods of the bugs that only appear decades apart will appear simultaneously in 2024.

This is the first time such a thing has happened in 1803. There was not even a city of Chicago as we know it today in 1803 – the year the U.S. government built Fort Dearborn at the present-day intersection of Michigan Avenue and Wacker Drive downtown.

One group – Brood XIX – appears every 13 years and will be back this year for the first time since 2011. Another – the better-known Brood XIII – will appears every 17 years and will be back for the first time since 2011.

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GENE KRITSKY / MOUNT ST. JOSEPH UNIVERSITY

The cicada broods emerge from underground to engage in an approximately month-long mating ritual – during which they shed their skin, and in the words of researchers, “sing.”

Both the 13-year and 17-year cicadas will appear in Illinois and Indiana when the ground warms up in late April or early May. But the University of Connecticut reported the broods do not overlap to a significant degree – and thus, the co-emergence of the two broods will not involve “extreme or ‘double’ densities” of cicadas beyond what is expected for any periodical cicada emergence year.

And there is fun to be had on the news when the 17-year cicada emerges. In 2007 – the last time Brood XIII year – CBS 2 Meteorologist Ed Curran enjoyed a cicada po’ boy live on our old CBS 2 Morning News, with Roseanne Tellez and the late Randy Salerno observing from the studio. The tasty cicada po’boy was prepared by Jimmy Bannos of Heaven on Seven restaurant fame, during a live hit at the Morton Arboretum in Lisle.

During Brood XIII’s last appearance before that in 1990, our archive shows that the late CBS 2 reporter Bob Wallace also ate a cicada – deep-fried at Café Ba-Ba-Reeba! on Halsted Street in Lincoln Park. He described the flavor and texture as “kind of soft-shell crab.”

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The late CBS 2 reporter Bob Wallace prepares to eat a deep-fried cicada for Channel 2 News, Ba-Ba-Reeba! Restaurant, May 31, 1990. CBS 2 

You may not want to eat the cicadas, but you should be aware that they’re harmless – and the periodical broods won’t be around long.

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