1803-era Northern Illinois and Great Southern Brood cicadas emerge concurrently, attracting global attention for their loud mating calls.

Cicadas in Northern Illinois draw international attention as both the Northern Illinois Brood and the Great Southern Brood emerge concurrently for the first time since 1803. Their loud mating calls, reaching decibel levels comparable to a jet engine, attract enthusiasts, artists, and researchers from various US states and countries. This unique phenomenon offers an opportunity to compare the diverse songs of both broods.