2 broods of screaming cicadas will emerge this year for first time in 221 years
For the first time since the Louisiana Purchase in 1803, two broods of cicadas – XIX and XIII – will come out of the ground simultaneously after more than a decade of eating to transform into adults. There are seven species of periodical cicadas – three that appear every 17 years and four that appear every 13.
This will be the first time since the Louisiana Purchase in 1803 that these broods of noisy, flying insects will emerge from underground.
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Empty, nymphal skin of cicadas remain in a tree following the hatch of Brood XIII June 11, 2007 in Willow Springs, Illinois. The periodical cicadas are among the millions in the area that have emerged from the ground and taken to the trees during the past couple of weeks as part of their 17-year hatch cycle.