The sight and sound of trillions of cicadas surfacing across much of America has scientists buzzing, as a massive invasion of two separate broods are emerging at the same time.
For the first time in more than 200 years, two broods — Brood XIX, known as the "Great Southern Brood," and Brood XIII, known as the "Northern Illinois Brood" — will emerge from the ground simultaneously.
While there is not extensive overlap between the two broods, some regions, especially in America's heartland, will experience a double-whammy of cicada occupation, experts told ABC News.
The cicadas are coming: What to expect from the double brood emergence of trillions of breeding, singing bugs
For the first time in more than 200 years, two broods of cicadas will emerge from the ground at the same time.
