Brood X Cicadas 2024. 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 2021 cicadas, known as brood x, are the biggest of the 15 known periodical cicada broods.

Where billions of cicadas will emerge this spring (and over the next decade), in one map. Brood x, one of the.