how often do cicadas come
Most cicadas go through a life cycle that lasts from two to five years. Some species have much longer life cycles, such as the North American genus, Magicicada, which has a number of distinct  broods  that go through either a 17-year or, in some parts of the world, a 13-year life cycle.ost cicadas are cryptic, singing at night to avoid predators. The periodic cicadas spend most of their lives as underground nymphs, only emerging after 13 or 17 years, most likely to reduce losses by satiating their predators.