“Tens of billions of noisy cicadas are set to pop out of the ground in the coming weeks in a rare synchronized event that last occurred 221 years ago.
“The winged insects are expected to appear across the Midwest and Southeast starting early May, in a double emergence of two different broods of periodical cicadas. These bugs spend a fixed number of years underground before coming to the surface to take part in a raucous mating ritual.”
Read more at NBC