Cluster flies are usually outdoor flies, however, if the weather becomes much cooler, in late autumn and winter, for example, they’ll often choose to transfer inside, at times in their thousands, and may be found hibernating in structures or attics. This is the reason they are generally called “attic flies”.
They look very similar to the regular housefly though they are somewhat more substantial in proportions and will be identified by bodily markings like the yellowy golden-colored hairs around the thorax and also the different shades of grey throughout the abdomen.
In addition, they move more lethargically than the common housefly. They give preference to inaccessible places such as within the walls, inside cracks and cavities near to the ceiling or close to windows, or in basements, lofts or any other rooms that are not used very often.
When the weather warms up a little, they may start flying around and anyone who has ever experienced an invasion will tell you this isn’t an enjoyable experience. Though they are often associated with bad hygiene in a certain place, they tend not to carry around diseases and therefore tend not to signify a danger to people.
This is particularly since they will not lay their eggs within the food of human beings. Rather they much choose to turn their curiosity to earthworms and look to lay their eggs near their burrows.
They will likely either do that in soil or on leaves which are decaying. When their eggs have finally hatched, their larvae will appear to locate earthworms and will look to prey on them so as to obtain their nutrients through the body of the earthworm.
This leads to a lot of damage to the earthworm and will finally kill them. When their larvae have grown into a full-grown adult, they will depart the earthworm as they are now fully able to support themselves.
Nonetheless, while they won’t cause any real inconvenience to people they can still be a great pain to us whenever they happen to be in our environment. Houses and structures that are in the country can be more vulnerable to luring them due to the fact that there are fewer places for the adult flies to find shelter.
You’re also going to find them in structures that are situated in close proximity to where earthworms are present, for instance, areas of turf or grass, gardens.
Houseflies will spend the daylight hours resting inside if possible; however, they will also rest outside if they cannot find a building that they can access. You are likely to find them hanging on ceilings and walls, and on dangling light cords and cables.
Outside, they can be found on plants, bins, edges of buildings and plants. They prefer to be on corners or curved edges so that they can take advantage of their wide peripheral vision.
To control any infestations, cleaning and removing all potential breeding areas is fundamental.
Regular removal and covering household waste is the most obvious of all of the breeding grounds, as it is something that you have control over.
Cleaning away all spillages of meat, vegetables or pet food will also provide less opportunity for flies to breed. Further to this, refrain from putting meat or manure on compost heaps as this would make them perfect breeding grounds.