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The average life cycle takes 60 days at room temperature. The German cockroach is the species most commonly found in households for several reasons: (1) it has a larger number of eggs per capsule, (2) nymphs reach sexual maturity more quickly than other cockroaches, (3) the female carries the egg capsule and protects the embryos until hatching, (4) German cockroaches are small and can conceal themselves easily, and (5) they can rapidly build up resistance to insecticides. This species is very active.

Both sexes are fully winged although they rarely fly. They're often carried from place to place in items such as bagged potatoes and onions, bottle cases and cartons and food packages. They travel readily from one location to another and pass through very small openings.

Places where German cockroaches are found often share many common characteristics; they'll usually be warm, dark, and have small cracks and crevices or other small openings into dark confined areas. Such places will generally be rather moist or located near water sources and food supplies.

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