Historic Double Emergence of Cicadas in Illinois After 221 Years

Two broods of periodical cicadas, Brood XIX and Brood XIII, are emerging together in Illinois for the first time since 1803, creating a rare natural spectacle.

Cicadas have been spotted in various parts of Chicagoland, arriving about a week earlier than anticipated due to warmer weather.
This year marks a unique convergence of the 13-year and 17-year cicada cycles, last seen during Thomas Jefferson's presidency.
The insects are harmless to humans but can damage young trees as females lay eggs in branches.
Cicadas are expected to remain visible through June, with their signature singing beginning a few days after mass emergence.
Nature enthusiasts are traveling to Illinois to witness this rare event, highlighting the cicadas' role in the ecosystem.