In 2025, a significant brood of periodical cicadas is set to make a spectacular appearance in the eastern United States. Known for their loud and distinctive buzzing, these insects will primarily emerge in Kentucky and Tennessee, with varying populations expected along the East Coast, from Massachusetts to western Georgia.

Understanding Periodical Cicadas

Periodical cicadas, identifiable by their red eyes and unique sound, are about one inch long and belong to the same family as stink bugs and bedbugs. Unlike annual cicadas that appear in smaller numbers each summer, periodical cicadas synchronize their emergence in 13- or 17-year cycles, forming distinct broods identified by Roman numerals.

Brood XIV: A Look Ahead

The upcoming emergence of Brood XIV represents the largest gathering of periodical cicadas anticipated this year. According to researchers from the University of Connecticut, historical data suggest that the cicadas will primarily Hatch in regions where they were previously observed. This brood last emerged 17 years ago, making its reappearance particularly noteworthy.

Where Will They Emerge?

Utilizing data from the University of Connecticut, CBS News has developed an interactive map that predicts Brood XIV’s expected emergence areas. While the brood will be concentrated in Kentucky and Tennessee, insights draw attention to smaller populations forming in parts of Georgia, Illinois, Indiana, North Carolina, Virginia, West Virginia, and along the northern route, including Long Island, New York, and Cape Cod, Massachusetts.

Timing of the Emergence

While Brood XIV is anticipated to surface by June 21, 2025, the emergence may vary based on local soil temperatures. Cicada experts like Matthew Kasson explain that when soil temperatures reach approximately 64 degrees Fahrenheit, the cicadas will begin to emerge. Consequently, cicadas in warmer areas may appear earlier than those in cooler climates.

The Cicada Life Cycle

Prior to emerging, periodical cicadas live underground for many years as larvae, feeding on root fluids. Once conditions are right, typically resulting in trillions of cicadas surfacing simultaneously, they make their presence known through their characteristic loud calls, which serve a dual purpose: attracting mates and asserting territory.

Following their mating rituals, females lay eggs in tree branches, which will hatch within about eight weeks. The young cicadas, known as nymphs, then fall to the ground and burrow into the soil to begin their growth cycle anew, completing the cycle that may take 13 or 17 years depending on the brood.

Are Cicadas a Threat?

Cicadas pose no danger to humans or pets. They do not bite, sting, or possess venom. The Environmental Protection Agency notes that while pets might experience minor digestive issues if they consume large quantities of cicadas, moderate consumption is harmless.

Moreover, cicadas play a vital role in the ecosystem. They serve as a food source for various predators, contribute to soil aeration, and enrich the soil with nutrients upon decomposing. However, their reproductive patterns may pose a risk to young trees, which can easily be protected with nets or screens.