Image showing the different stages of the caddisfly Pycnopsyche Gentilis.

Shredders 2. Larvae of the caddisfly Pycnopsyche gentilis eat leaves. They spin silk and weave together a case of stones. Eventually, they pull themselves inside and seal off the case, then pupate for several weeks undergoing a miraculous metamorphasis to the beautiful adult pictured below. Photo reprinted, by permission, from Skip Hodges.

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