Illinois Cicada Brood Map 2025. The two cicada broods were projected to emerge in a combined 17. The historic 2025 cicada emergence will see two broods of cicadas emerging this spring, and while some sightings have already been reported, how can.
The nature conservancy has preserves that lie in both the northern illinois brood (xiii) region and the great southern brood (xix) region. One brood of cicadas will be prevalent in the northern half of illinois, while the second brood will be in the southern half of the state.