I grew up in Illinois and I recall a lot of cicadas every year. There are many different types of cicadas and the ones that come out in mass every several years are just one species. When I can catch them around here in the summer they make a fine meal.
The green margined cicada in the photo is the type that occur every year. The periodical cicadas are nearly solid black and usually have red eyes (there are a few different types of periodical cicadas).