Cicadas 2024 Texas Tech. Billions of cicadas are expected to surface this spring as two different broods — one that appears every 13 years, and another every 17 years — emerge simultaneously. A texas a&m agrilife entomologist explains the rare phenomenon.

This spring, two broods of periodical cicadas will surface across the u.s. Where billions of cicadas will emerge this spring (and over the next decade), in one map.