Cicada Map 2025 Illinois Time – The Northern Illinois cicada information, which includes maps showing where the broods have historically emerged. The double emergence of Broods XIX and XIII is rare, occurring every 221 years . This spring, billions of bugs are expected to be flying around a portion of the middle of the United States, including the Midwestโs largest city. .
Cicada Map 2025 Illinois Time Why Do Some Cicadas Appear Only Every 17 Years? | Britannica: Two broods of periodical cicadas will emerge simultaneously for the first time in 221 years in the south and midwest and will overlap near Chicago. . More than a dozen states should prepare for a particularly loud summer full of screeching cicadas. See if yours is one of them. .