The German cockroach is the most common of the four kinds. It develops and lives all over the building, particularly in kitchens and bathrooms. The Oriental roach is more sluggish than the three above-mentioned species. They develop in damp basements and sewers, foraging mostly on first floors of buildings. The young nymphs resemble the adults but they are smaller and have no wings.
Cockroaches hide during the day in sheltered places.
They come out to look for food at night, and if disturbed, run rapidly for shelter and disappear through openings to their hiding places. Some typical hiding places for roaches include warm, dark, moist places such as under a sink, behind a dishwasher, stove, refrigerator and under cupboards. Because they are often attracted by food residue and garbage, you should wash dishes promptly, seal food containers tightly, clean residue on jars and surfaces, and mop up spills. Repair water leaks and sweating pipes. Remove clutter, which provides hiding places.