How Long Will The Cicadas Be Here In 2024 Lok. Cicadas count years, likely using the flow of tree sap. For the first time in 17 years, the chicago area saw periodical cicadas emerge this spring.but those are long gone now.

Where billions of cicadas will emerge this spring (and over the next decade), in one map. See where to find brood xix and xiii − and where they’ve already been spotted.