カイコ
The "Bombyx" second hybrid is a cross between a male "Bombyx mori" moth and a female "Bombyx mandarina" moth. Since the male "Bombyx mori" (domestic silkmoth) does not fly, it is completely dependent on humans to reproduce. They produce larvae called silkworms, like all species in "Bombyx", except they are brownish in the first half and grayish at the bottom half. They produce silk and give out black droppings.