Dual Cicada Brood Emergence In 2024. Cicadas are among the world's loudest insects,. May 6, 2024, 9:00 am.

An animated look at what will happen in the upcoming emergence of brood xix and brood xiii, when more than a trillion cicadas will surface. The northern illinois brood spends 17 years underground before surfacing and is known as brood xiii, while the great southern brood, or brood xix, lives.