Pest Library


German Cockroach



Adults are 1/2 to 5/8 inch long. They are pale brown or tan with two parallel black streaks on the shield which covers the head German cockroach females protect their egg cases by carrying them around. The egg case protrudes from her body until the eggs are nearly ready to hatch. Each case can contain 30 to 48 eggs that require about 2 weeks to hatch. A female German cockroach may produce between one and seven cases during her life. Adults may live 3 to 4 months. German cockroach nymphs are about 1/8 inch long when they hatch. They are uniformly dark, except for a light brownish area in the middle of the body.

American Cockroach



Adults range in size from 1-1/2 to 2 inches long . Generally, they are red-brown in color, with pale yellow "halo-like" markings on the pronotum above the head. The nymphs are about 3/16 inch long when they hatch from the egg case and are initially gray-brown. American cockroaches are often found in dark, moist, warm areas, especially around sewers, storage rooms, and garbage sites. Along the coast, they may be found in trees, especially palmettos. When inside, they generally stay on the basement and first floor levels. Adults may fly on warm evenings.

Oriental Cockroach



Adults are 1 to 1-1/4 inches long and dark brown to jet black in color. The wings of the males are not quite as long as the body, while the females have only small wing pads. The nymphs are about 1/4 inch long when they hatch and go from red to brown as they develop. These cockroaches prefer dark, damp, relatively cool locations. These cockroaches are commonly found in bathtubs because they have difficulty climbing smooth surfaces. They also can be found in water meter boxes, sewer lines, leaf litter, crawl spaces, and basements. In a structure, they rarely go above the basement level.