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First things first, what are cicadas? The cicadas are a superfamily, the Cicadoidea, of insects in the order Hemiptera. A cicada will stay underground from 2 to 17 years depending on the species, after they emerge from the ground as nymphs- the immature form of invertebrates, particuarly insects- then climb to the nearest tree and shed their exoskeleton. But the question remains, what is swarmageddon? Cicada Broods usually don’t overlap geographically, and it is very rare when they emerge in the same year. In 2013 hordes of flying insects emerged for the once-in-a-generation phenomenon popularly known as "Swarmageddon".