The moth is a surprising insect. The finest silk bed sheet comes from the silkworms produced by the Bombyx mori moth. The moth cannot fly nor can it see. Its only job is to lay eggs. One moth will lay approximately 500 eggs over a 4-6 day period. Soon after that the moth dies.  
Those 500 eggs the Bombyx mori moth lays are very tiny, about as big as the point of a pin. They don't weigh much either, only about 5 grams or a little under 2 ounces.  
The silkworms from the Bombyx mori moth, which produces the finest and purest silk fabric, are fed a diet that consists only of chopped mulberry leaves. The silkworms are fed every half hour around the clock. No wonder they multiply their weight by 10,000 times in a month.