Illinois Cicada Brood Map 2024. Illinois presents a particular challenge for understanding periodical cicada biology, because it contains both 13 and 17 year life cycles, all 7 currently recognized species, and five separate broods, some of which include disjunct populations. 2024 is a big year for periodical cicadas in illinois, where broods xiii and xix will be emerging throughout much of the state at the same time.
The 2024 periodical cicada emergence. The northern illinois brood, or brood xiii, will be most seen in parts of northern illinois and indiana, and possibly even in wisconsin, iowa and parts of ohio.
