Trillions of Cicadas to Emerge Across Eastern US in Rare 17-Year Event

In a rare phenomenon not seen for over 200 years, trillions of red-eyed periodical cicadas are set to emerge from underground across the eastern United States in the spring of 2024. This event marks the simultaneous emergence of two distinct broods - the 17-year Brood XIII and the 13-year Brood XIX - which last occurred in 1803 during Thomas Jefferson's presidency.

The cicadas, known for their loud mating songs that can reach the volume of a lawnmower or motorcycle, have already started to make their presence known in parts of South Carolina. Residents in Newberry County have reported the insects' collective noise, leading to numerous calls to local authorities. The Newberry County Sheriff's Office has assured the public that the cicadas pose no danger to humans or pets and are simply the "sounds of nature."

Entomologists expect the emergence to generate trillions of cicadas across a vast region spanning 16 states, from Maryland to Oklahoma and Illinois to Alabama. As soil temperatures reach 64-65 degrees Fahrenheit and heavy rains loosen the ground, the nymphs that have spent 13-17 years feeding on tree roots underground will begin to hatch.

Why this matters: The co-emergence of Brood XIII and Brood XIX cicadas is an extremely rare natural phenomenon, occurring only roughly every 221 years. This event provides a unique opportunity for scientists to study the mysterious life cycle of these insects and their impact on the ecosystem.

While the cicadas may cause some damage to young trees and fruit crops, they also serve as a valuable food source for various species, especially songbirds. Experts advise embracing the natural wonder of the event and using community science apps like "Cicada Safari" to help researchers track the emergence. For those who find the cicadas' presence bothersome, staying indoors or planning a vacation during the peak of the emergence, which typically lasts 4-6 weeks, may be the best strategy.

Dr. Gene Kritsky, the creator of the "Cicada Safari" app, described the upcoming phenomenon as "biblical" and a spectacular event to witness in the region's forests and hiking trails. "This is a real treat. This is an unusual biological phenomenon. Periodical cicadas only occur in the eastern United States; they don't occur anywhere else in the world," Kritsky said.

Key Takeaways

• Trillions of 17-year and 13-year cicadas to emerge in 2024 across 16 U.S. states.
• Last simultaneous emergence of these broods occurred in 1803 during Thomas Jefferson's presidency.
• Cicadas pose no danger but may cause damage to young trees and fruit crops.
• Emergence provides unique opportunity for scientists to study cicada life cycle and ecosystem impact.
• Experts advise embracing the natural wonder and using community science apps to track emergence.