adult moth is bronze-brown, with dark-brown to black flecks on the forewings.
The male and female average 8.5 and 14.5 mm in length, respectively. The
full-grown larva is white, with a tan head, and is about 6 mm long. The
brown house moth feeds on animal and vegetable matter in many countries
around the world. The larval stage feeds principally upon upholstery,
carpets, furs, skins, dried specimens of animals, in birds' nests, dried
plants, dried fruits, and sometimes on books. In some instances this moth
has been found damaging leather bindings. The brown house moth is more
destructive than the common clothes moth. Its faeces are oblong and larger
than those of the common clothes moth. The two pictures below show a tennis
ball and some knitting, showing how much damage they can do..!
life history of this moth is extremely variable, primarily due to variations
in temperature. Under favourable conditions, the female can lay 500-600
eggs. The incubation period varies from 8 to 110 days; the larval stage
from 71 to 145 days. The larva may enter a desiccation-resistant stage
prior to pupation (diapause), which may last for months. The complete
life cycle in the field usually takes from 11 to 13 months. The larvae
are very sensitive to desiccation and if the humidity is constantly below
80% they cannot complete their development.
warehouses in Britain, it is usually an omnivorous scavenger in spilled
cereals and flour, but sometimes attacks bulk wheat, bagged flour, and
other commodities, and is also found in homes. This moth is believed to
owe its persistent survival to its omnivorous habits, its high reproductive
capacity, and the resistance to adverse conditions of all stages except
the growing larvae, which thrive only in high humidity as we said above.
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