German Roaches are relatively small roaches that are considered “domestic” roaches (they cannot adapt to living outside). But they are perfectly adapted to living in a home and commercial environment. They multiply fast, can track germs around, defecate on everything, can cause allergic reactions, and even produce an awful smell that when in large numbers might make the house smell a bit like vomit! They are often very difficult to eliminate due to the way that they live (inside crevices up around items like kitchen cabinets, refrigerators, etc) and they do have resistance to common pesticides.