German Cockroaches (Pictured) are the most common found in Northwestern Ontario. Cockroaches tend to infest kitchens, food storage areas, bathrooms, but are capable of living in any portion of a heated structure. German Cockroaches develop rapidly under suitable conditions, are more active at night and if noted during the daylight hours is a sure sign of high numbers. Nymphs are dark brown to black in color, with distinct dark parallel bands running the length of the pronotum. Nymphs do not possess wings. The Adult is 10 to 15 mm long, brown to dark brown in color with two distinct parallel bands running the length of the pronotum.