Cicadas 2024 Maryland Zip. The event jonathan larson, an extension entomologist at the university of kentucky, is referring to is the simultaneous emergence of two cicada broods that will. 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.
The brood x cicada rises from its slumber once. This page covers the biology and behavior of cicadas, what to expect.