Cicada 2024 Brood. The university of tennessee extension compiled different superstitions that. Although cicadas are a valuable food source for birds and small mammals, in large numbers their deafening calls can.

For the first time in 221 years, this spring will see billions, if not trillions, of cicadas take to the skies in a rare synchronized. Maps of two cicada broods, reunited after 221 years.