Some species live only one year; the periodic cicadas are better known due to their staggering emergences. A predator-response strategy has led the species to stay beneath ground for either 13 or 17 years (depending on the particular species) and then come up more or less at the same time. This allows a range of creatures to eat as many as they want and still allow a good percentage of the insects a chance to reproduce.
And here's a single one:
In 2004 the "famous" Brood X emerged in many states on the Eastern Seaboard; I drove down to Princeton, NJ; slept in my car on campus during Memorial Day weekend; and harvested eight or nine pounds of cicadas from a few massive beech trees on the Princeton campus. I've been serving them -- sauteed or dry-toasted -- to the public ever since. A few images of that event are on my website.
Though the bowl design features "pasta," we should note that insects are basically the protein source of a meal.
Cicadas are found worldwide and are a very popular food. Heck, Aristotle wrote that the last earth-bound stage, before the animal breaks through its thin brown shell, that's the tastiest. He loved them.