The North American insect called a cicada (‘Magicicada’) emerges from the underground after how many years?

Red, another interesting fact, don't eat cicadas if allergic to shell fish. Cicadas share a family relation to shrimp

Interesting fact. The adult cicada has no mouth or digestive system. They have one purpose, to procreate. They spend all of those years underground, as grubs, just waiting to emerge, mate, and die in only a few days.