The United States is waiting for the invasion of millions of cicadas who have spent 17 years underground

12 months ago

Parts of Virginia, West Virginia, North Carolina and some other states may soon be filled with cicadal sounds because entomologists predict a density of up to 1.5 million insects per acre.

The reason for this cacophony is the appearance of brood IX (9), who spent the last 17 years underground as nymphs. “A large number of cicadas appearing simultaneously can be a noise problem,” said Eric Day, an entomologist from Virginia. – But I hope it won’t be annoying to people because it’s an amazing event. “Periodic” cicadas – such as Magicada septendecim, Magicada cassini and Magicada septendecula – spend most of their lives in the soil in the form of nymphs. After 13 or 17 years, depending on the species, the nymphs dump their shell and come to the surface to mate and start the cycle anew. But why the cycle occurs every 13 or 17 years and not every 12 or 16 years is “one of the greatest mysteries of the insect world”. Different broods cover different geographic regions, this time “invasion” cicadas are predicted in Virginia, North Carolina and West Virginia. Brood X, due next year, will “occupy” Pennsylvania and Washington (D.C.). Unlike some other insect species, cicadas are not a particular threat, but entomologists advise people not to start growing trees a year before cicadas appear.

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