There are both annual and periodic cicadas. I lived through a 17 year bloom (there are also 13 year cicadas in the US), and it’s quite different from the usual

There are both annual and periodic cicadas. I lived through a 17 year bloom (there are also 13 year cicadas in the US), and it’s quite different from the usual numbers. According to wiki, it seems like the periodic broods are solely within the US/Canada.