Double Cicada Brood 2024 Wikipedia In English. The two groups that are emerging, known as brood xix and brood xiii, appear together just once every 221 years. Broods are categorized based on.

This exciting double event won’t happen again until 2245. 2024 is going to be another year of the cicada, with the emergence of two periodical cicada groups, or broods (brood xiii and brood xix), at the same time,.