Rise of the Cicadas

Two broods of cicadas are expected to emerge next month, which could result in the appearance of more than one trillion insects in the eastern and midwestern United States. Periodical cicadas, known for their unusually long and synchronized life cycles, surface in spring only every 13 or 17 years, as millions of insects materialize from the soil in a matter of weeks—and die shortly thereafter. In between, they’re tough to miss, making a raucous clicking sound that can be heard far and wide.
Did You Know? The 17-Year Cicada. The 17-year cicada is a variety of the periodical cicada that appears in the northeastern quarter of the United States.
How Do Cicadas Know When to Surface?
Encyclopædia Britannica, Inc.
Why Are They So Noisy, Anyway?
© Valeriy Kirsanov/stock.adobe.com
Here’s Why Some Cicadas Appear Only Every 17 Years
© emptyclouds—iStock/Getty Images

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