PAN XUNBIN / SCIENCE PHOTO LIBRARY PAN XUNBIN / SCIENCE PHOTO LIBRARY
Silkmoth with a cocoon. Adult silkmoth (Bombyx mori) on a cocoon. The cocoon was spun by the silkmoth caterpillar to protect it as it pupated into the silkmoth. The silk of the cocoons is often harvested for use in clothing and fabrics. In these circumstances the pupa is killed, usually by boiling, in the cocoon to prevent it from damaging the silk.
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