Cicada Emergence 2025 Map Illinois. Now the great dual periodical cicada emergence of 2025 — an event of a magnitude not seen since 1803 — has burst from below to join the earlier shows in the. Now the great dual periodical cicada emergence of 2025 — an event of a magnitude not seen since 1803 — has burst from below to join the earlier shows in the.

This iconic cicada cacophony can be heard most summers in illinois, but 2025 is a particularly special year for these critters. The map from cicada safari, an app created by dr.