The caterpillar of a
moth, Bombyx mori, which, like many other caterpillars, spins itself
a cocoon of silk in which it pupates. The cocoon of B. mori is,
however, especially thick and may be composed of a single thread commonly
900 meters (2,950 ft) long. This is unraveled to provide commercial silk.
Originally a native of China, B.mori has been introduced to many
countries. The caterpillar, which takes about a month to develop, feeds
on the leaves of the mulberry tree.
|Silkworm larva and cocoon