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Moth of the Week

Domestic Silk Moth

Bombyx mori

The domestic silk moth is from the family Bombycidae. It is very closely related to the wild silk moth (Bombyx mandarina), which was first described in 1872 by Frederic Moore. The domestic silk moth was created through selective breeding in order to produce more silk and therefore lacks several behaviors of other moths.

Description This species has white hairy bodies, legs, and wings unlike the wild silk moth which is pigmented brown. This loss of color is due to the domesticated moths no longer needing camouflage. Additionally, this species wings form from larval imaginal disks, and although some may be able to hover, due to domestication the B. mori in incapable of prolonged flight as their bodies are too big to carry. This changes their mating behaviors.

Compared to the wild silk moth, the domesticated silk moth has increased cocoon size, body size, growth rate, and quicker digestion.

Wingspan Range: 3 – 5 cm (1.2 – 2.0 in)

Females are about 2 to 3 times the size of males to carry the eggs.

Diet and Habitat Silk moth larva or silkworms prefer to eat white mulberry leaves and other species of mulberries. They are also known to eat the leaves of the osage orange.

As domesticated species, these moths live in man made habitats for silk production.

It’s undomesticated relative the wild silk moth, B. mandarina, ranges from inland China to Korea and Japan.

Mating Since they cannot fly to find mates like the males of other silk moths species, the B. mori is completely dependent on humans for mating.

The eggs laid are put in and hatch in incubators after approximately 14 days.

Predators This species has no predators due to being taken care of by humans. They have also lost their camouflage, seen in the B. mandarina, from domestication.

Fun Fact Many Asian cultures such as Indian, Chinese, Korean, Vietnamese, and Thai eat silkworms. They are roasted, boiled, and/or packaged for snack sale. They have also been proposed as food for astronauts on long missions.

(Source: Wikipedia)

Drawing my favourite character while I relisten to Unprepared Casters!

Arc 3: Bombyx Mori 💚