In late April, a massive number of cicadas, totaling in the trillions, will emerge in the Midwest and Southeast regions of the United States.

 These cicadas belong to two different groups, known as broods, and it's quite a spectacle to witness their simultaneous appearance after years of hiding underground.

• It’s the first time since 1803 that Brood XIX, or Great Southern Brood, and Brood XIII, or the Northern Illinois Brood, will appear together in an event known as a dual emergence.
• Temperature determines when they emerge.
  • The soil needs to reach 17.78 degree Celsius, about 6 inches deep, and with the rainfall they come out.
• Cicada: family of more than 3,000 species of sound-producing insects.
  • They are found in tropical and temperate areas worldwide and occur in deserts, grasslands, forests.
  • Nearly 60 species are found in Europe, the Middle East, and parts of Africa. 

Read More About- Dual Emergence in Cicadas