Double Brood Cicada 2024 Map Download. The nature conservancy has preserves that lie in both the northern illinois brood (xiii) region and the great southern brood (xix) region. What two broods are involved in this year's dual emergence?

The double brood emergence is hitting a combined 17 states this year. For the first time in over 200 years, two broods of cicadas will come up from the earth at.