The German Cockroach is 1/2 to 5/8 of an inch long when it is mature. German cockroaches are tan to light brown in color, and have fully developed wings. The adult males are narrower than the females. In her lifetime the female German cockroach will produce 4 to 8 capsules each containing 30 to 40 eggs. Adults live 100 to 200 days. German cockroaches are the most common household insect within the United States. This pest is mostly found in kitchens and bathrooms but will live anywhere in heated structures.