2025 Cicadas Illinois. About six to 10 weeks after they are laid, the eggs will begin to hatch. 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. 2025 is a big year for illinois.