Three species of cicada that only emerge once every 17 years are gearing up to spring to the surface in droves.

A large swath of the eastern U.S. -- from Massachusetts down to Mississippi and Georgia -- will start to see cicadas emerge ...

Once the nymphs find somewhere to stop on their climbs, they molt and the adult cicada will emerge, Cooley said. The males will begin to sing to garner the females' attention, Reall said.

Once the nymphs find somewhere to stop on their climbs, they molt and the adult cicada will emerge, Cooley said. The males will begin to sing to garner the females’ attention, Reall said.