I agree, GHScorpios... Copied/pasted from the 'net. I'm in Arizona, so I want readers to take particular notice of the last sentence. We hear them every summer and see their interesting little empty shells stuck on trees, etc. "Periodic cicadas, however, do synchronize their emerging, so every 10–17 years depending on the species, large groups (broods) of cicadas emerge at the same time. In the Northeastern United States, Brood X emerged during the summer of 2021. In Arizona, annual cicadas are more common."