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The second largest periodical cicada brood appears every 17 years.—Anthony Robledo, USA Today, 11 May 2025 The ones expected to arrive in droves this year are a variety called periodical cicadas, which appear in huge swarms and often create loud buzzing sounds, according to the National Wildlife Federation.—Taylor Johnston, CBS News, 23 Apr. 2025 Adult periodical cicadas only live three to four weeks, according to the Smithsonian National Museum of Natural History.—Josh Hammer, MSNBC Newsweek, 14 Apr. 2025 Annual cicadas emerge around the world each year, but periodical cicadas are found only in eastern North America.—Chad Murphy, The Enquirer, 2 July 2025 See All Example Sentences for periodical cicada
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