Flies are common pests in homes and commercial premises. Flies are normally associated with decayed food or animal carcasses.
The most common flies associated with buildings are the housefly, fruit fly and the cluster fly.Houseflies and fruit flies tend to enter buildings
searching for food. They feed on rotting matter. The fruit fly is very small, only 3mm long and is especially associated with fruit and
Cluster flies tend to be more of a problem as they are found in large numbers. The adultcluster fly is 8mm long and is dark grey with short
golden hairs. When at rest the wings overlap, unlike the housefly whose wings do not overlap. They feed on nectar.During the summer and
autumn cluster flies are of no consequence. However, as the weather cools they seek shelter in houses and buildings, often in loft spaces
where they form clustering masses, often with several thousand flies clustering together. They can return to the same property year after year.
The large mass of flies produces a sickly smell and, if warmed up by central heating during their hibernation, flies may emerge and appear
dozy. It is at this point that large numbers can come down into the house and cause a nuisance.
Keeping windows shut or screening them will prevent entry of houseflies and fruit flies. Any that come into the house can be dealt with
individually. If there are large numbers the food source should be sought and disposed of. Sealing around gaps in eaves and fascia boards
may help prevent cluster flies entering a loft space, other treatments could be used control these nuisance pests.
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