Cockroaches are one of the oldest groups of insects indicating how successful they have been in adapting to changes in their environments, this success may be related to their diet. They prefer food sources such as starches, sweets, grease and meat products, but other items may include cheese, beer, hair, flakes of dried skin or decaying organic matter. Cockroaches are attracted to warm, moist environments. They spend the daylight hours in dark, secluded sites.