How Much Silk Is in a Cocoon?

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The silk in the cocoon of a silk moth can reach 300 to 900 meters long when stretched out. It takes a caterpillar about four days to wrap that amount of silk around the pupa. Learn more about silk moths with information from an entomologist and insect specialist in this free video on silk moths.

Part of the Video Series: Insect Information
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Video Transcript

I'm Mike Quinn. I've been an Entomologist for twenty years and we're here at the Lady Bird Johnson Wild Flower Center in Austin, TX. And we're talking about how much silk is in a cocoon. The silk producing moth is a species native to Asia, China specifically. And that single strand of silk can run three hundred to nine hundred meters or a thousand to three thousand feet. So obviously that's a huge length of silk and it takes the caterpillar about four days to wrap that around the pupa. This is a wild silk moth here in North America and we don't use these to produce silk but you can see the extent of silk in there it's comparable to the Asian Silk Moth. And that's how much silk is in a cocoon.

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