Brood Xix Cicadas 2024.  — 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.  — brood xix, known as the great southern brood, contains four species of cicadas and emerges only every 13 years.

 — 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. After 2024, brood xiii and brood xix cicadas won’t sync up their emergences again until the year.