Two large broods of cicadas in the Midwest and southeastern U.S. are set to surface simultaneously—something that hasn't happened in over 200 years.
While some cicadas emerge every summer, some are considered"periodical" cicadas, and only emerge every few years. This spring, two large broods will emerge in the southeastern and midwestern U.S.Two large broods of cicadas in the Midwest and southeastern U.S. are set to surface simultaneously—something that hasn't happened in over 200 years.
For those living in any of the states that may bear witness to the double broods, the first sign that the cicadas are coming will be holes popping up in lawns, around trees and in the woods, said Zoe Getman-Pickering, an ecologist at the University of Massachusetts Amherst. The area of overlap is likely to be “very, very narrow, maybe just a few miles,” said Gene Kritsky, an entomologist at Mount St. Joseph University.
Urban development forces the cicadas in an area to all converge on fewer remaining trees; which also heightens the spread of diseases, like Still, what scientists know about the climate impact on synchronized cicada emergences is limited because data is limited, according to Getman-Pickering. Rising temperatures and extreme weather events could, however, end up altering when broods come aboveground to mate, which reduces the survival chances of those populations as a whole, as safety in numbers is part of a brood’s survival strategy.
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