A picture of a Silkworm Larva and a Cocoon
The silkworm larva attains a maximum length of 7.5 cm (about 3 in). It pupates over a 45-day period within a cocoon made of one continuously wound silken thread. When straightened, each thread can reach lengths of 900 meters (1000 yards). ßíäåêñ.Ìåòðèêà