Cicada 2024 Factset. For the first time in 221 years, this spring will see billions, if not trillions, of cicadas take to the skies in a. That’s because 2024 will see two separate batches of periodical cicadas emerge en masse, spread across much of the eastern half of the u.s.

In 2024, two different broods of cicadas have emerged, sending billions to the surface for the first time since 1803. A visual guide to 2024’s rare dual appearance.