A fly is an insect and lives in many common areas of the human community. This insect feeds on food and human waste where it can collect and transport various pathogens. There are two potential signals that trigger aggregation in the common housefly. The first of these is visual attraction; that is, particular wavelengths of light, or colors, or shape patterns that flies perceive optically and find attractive. The second type of signal is olfactory; chemical attractants that stimulate flies to move towards them. The fly collects pathogenic organisms as it crawls and feeds. Flies create some of the public health problems in human society. Flies create some of the major diseases such as sleeping sickness, leishmaniasis, and typhoid fever in the United States of America (Buchanan and Dura, 2005). Flies go through a complete metamorphosis. Metamorphosis is the transformation of an insect from an immature larval form to an adult from a distinct stage. There are four main stages in the fly life cycle: egg, larva, pupa, and adult fly (refer to Figure 1 in Appendix 1). The first stage is the egg. At this stage the adult female will lay her eggs. Adult female flies will fly and lay eggs wherever there is a suitable location for them to breed with their cognition. Adult females produce hundreds of small eggs and are usually included in most organic material such as compost and waste. Flies lay their eggs individually and usually in small groups. The number of eggs produced depends on the size of the female flies. A female fly can lay up to 500 eggs in several groups, and each group has 75-150 eggs. Maturity of the eggs occurs in the next three to four days. The albumen of floaters is about 1.2 mm long. Normally, the and... half of the paper... especially the sugar. Access to animal manure does not extend the lives of adults, and they live longer in cooler temperatures. Adult flies need food before mating, and copulation is completed in as little as two minutes or as long as 15 minutes. Egg laying begins four to 20 days after copulation. Female flies need access to suitable food (protein) to enable them to produce eggs, and manure alone is not adequate. For this reason, the adult fly continues its life cycle from the beginning to the end of its life. Works Cited Buchanan, B. G., & Duda, R. O. (2005). General diseases of the housefly. Biological control possibilities for the housefly, 3(5), 80-87.Celes, W., Ierusalimschy, R., & Figueiredo, L.H. (2003). Common housefly nowadays. Pest Control and Management, 1(2), 111-119.Noran, O. S. (2008). The fly of evolution. Behavioral adaptation of the housefly, 2(4), 100- 105.