Japan's Wild Silkmoth: The Larva That Sings and the Cocoon That Engineers Itself

Walking through a satoyama forest in Mie Prefecture, I noticed something small and jewel-like clinging to an oak leaf. A bright green caterpillar, its body lined with blue gemstone-like protrusions — the larva of Rhodinia fugax, the Japanese wild silkmoth known as Usutabiga. This is not just a pretty caterpillar. It connects your backyard oak tree to cutting-edge biomaterial science, Edo-period folk medicine, and millions of years of evolutionary engineering. A Larva Built Like a Jewel The...

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