Oriental Cockroach


Believed to be of African origin despite its name, the oriental cockroach is one of the larger species of cockroach. These cockroaches are sometimes referred to as “waterbugs” because they hang out in damp areas, as well as “black beetle cockroaches” because of their smooth, dark bodies. Oriental cockroaches gain entry into households by going under doors and through gaps beneath siding, as well as following pipes, sewers and drains into a structure.
Oriental cockroaches exhibit a shiny black to a dark reddish-brown color. As adults, the male and female cockroaches, though both large in size, are quite different in appearance. Growing to only 25 mm in length, the smaller males have shortened, three-quarter-length wings.

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Biology & Behavior

Oriental cockroaches are not as common in Utah as the brown banded cockroach and the German cockroach. Adults are about 1 inch in length and dark brown or black in color. Wings of the oriental cockroach are short. Females only have small wing pads, while males have wings that only cover about 3/4 of their abdomen. ​Females drop egg capsules in warm, sheltered areas near a food supply. Each female produces an average of 8 egg capsules, each containing about 160 eggs. Under room temperature conditions, eggs hatch in about 60 days. Adult females may live about 180 days. Oriental cockroaches are almost always found around moist, dark sites. Common habitats include floor and storm drains, water meter boxes, around plumbing fixtures, moist crawl spaces, sewers, and around garbage. ​Oriental cockroaches are referred to as waterbugs and may be found outdoors during warmer months of the year. Oriental cockroaches are rather sociable, and clusters of them may be found in favorable habitats. They are seldom found high on walls, in high cupboards, or in the upper floors of buildings.



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