Cicada juveniles, or nymphs, emerge when the soil temperature at 8 inches in depth exceeds approximately 64☏. It is believed that the particular night of the periodical cicadas’ emergence depends on soil temperature. The periodical cicadas returning this year, known as the Magicicada Brood II, have been living underground for the past 17 years. These bugs with their black bodies, striking red eyes, and orange wing veins have a rather unique lifespan. In spring 2013, the return of the 17-year cicadas will cover areas from Georgia to Connecticut, and the air will hum with their mating buzz. ![]() Periodical cicadas are often known as “17-year locusts,” but they are not true locusts.
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