Do other organisms get any benefit from a cicada’s life cycle?

Cicadas are mostly beneficial. They prune mature trees, aerate the soil, and once they die, their bodies serve as an important source of nitrogen for growing trees. When cicadas come out, they're eaten by just about anything with an insectivorous diet.

After the long 2 to 17 years, cicadas emerge from the ground as nymphs. Nymphs climb the nearest available vertical surface (usually a plant) and begin to shed their nymph exoskeleton. Free of their old skin, their wings will inflate with fluid (hemolymph) and their adult skin will harden (sclerotize).

Should I kill cicadas?  While it can be tempting to use pesticides on cicadas, there's really no need. “Treating yards to kill cicadas will result in an unnecessary application of pesticides to the environment and treating these insects directly may also sicken animals who then try to eat them,” Troyano says.

Basically Cicada's feed off of plants while people and animals eat the cicadas... Hope this helps

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