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By Jen Rose Smith, CNN Updated 7:44 AM ET, Fri April 16, 2021 Get ready for early May or thereabouts, when Brood X cicadas are expected to emerge from underground across the eastern US. The large-scale event happens every 17 years. (CNN)Love is in the air this spring in the eastern United States, where billions of cicadas will soon appear in the biggest emergence event since 2004. The insects are part of a group called Brood X also known as the Great Eastern Brood which is expected in a geographical range stretching from Tennessee to New York. These cicadas have been subterranean for 17 years, tunneling and feeding beneath the soil. When they are back above ground, finding a mate will be, understandably, a top priority. The loud, buzzing drone cicadas make is actually a mating song emitted by male insects, flexing a drumlike organ called a tymbal.

United statesNew yorkIsrael generalDistrict of columbiaWest virginiaAndreas sandelPaula shrewsburyCincinnati northern kentucky international airport in hebronUniversity of maryland departmentJoseph universityAnimal medical centerEric day of virginia polytechnic instituteGreat eastern broodEric dayVirginia polytechnic instituteState university