The remarkable digital photography below, is section of "17 Year Cicada" written piece which is labeled within "17 Year Cicada Photo Gallery", "Cicadas 17 Years", "17 Year Cicada Evolution" and "17 Year Cicada Grubs".
17 Year Cicada: Cicada Bug 17 Years - But the biggest puzzle to biologists is the significance of cicadas extended life cycles.
Mature nymphs of periodical cicadas begin burrowing upward after 17 years of soil living on the depth of 2-24 inches. This is April, when they actually stop and wait for the proper emerging time. Their muscle structure undergoes major changes at this time.
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