Buy a fly swatter and use them against cluster flies. The larvae eat earthworms as food for 22 days, to which then they go into the pupae stage for about 12 days before emerging as adults. The hatching larvae enter earthworms, develop to their last larval stage, pupate and emerge as adults to begin the cycle anew. Adult flies emerge a few days later. A female cluster fly can drop her eggs onto rotting leaves or near an earthworms burrow. They aren’t the kind of visitors you want in your home or yard. You could easily get cluster flies confused with a regular housefly. But while cluster fly larvae may rely on earthworms to feed and grow to their adult stage, adult cluster flies are far more interested in finding a warm place to ride out the long winter - and that’s where indoor spaces like attics, basements, and low-traffic closets can come into play. This is because the larvae of a Cluster fly are an earthworm parasite that requires earthworms to grow into full adult Cluster flies. Young cluster flies (larvae) can dig into the soil in search of small earthworms to eat. If you find them lodged in cracks on your flooring or in the wall, then you can simply suck them up and dispose of them using a vacuum. Do you see large flies in the house all of a sudden? The first place you need to spray it into the cracks in the walls, as that is their favorite hiding spot. When red midge larvae are present in high numbers after a stomach sample, this is a go-to pattern for many tailwater guides. What an enlightenment that has been - cheese mites, bed bugs and confused flour beetles, I never knew such things existed but I have certainly learnt how Rentokil expertise and experience eliminates them. The cluster fly larvae are parasitic on earthworms and will pupate in the soil, emerging as adults ready to find shelter for the winter. A housefly has metallic green or blue colors on their ovular body, but cluster flies do not. The cycle takes from 27 to 39 days to complete, depending on temperature. The cluster fly larvae are parasitic on earthworms and will pupate in the soil, emerging as adults ready to find shelter for the winter. You can make your organic pesticide using items such as garlic, cayenne pepper, and Neem oil. The larva burrow into the worm and feed on it for up to a month. I joined UK Marketing for Rentokil Pest Control in January 2009. Lastly, cluster flies are slow movers, this is unlike a housefly that moves quickly. Cluster flies are medium to large (8-15mm) 'dopey' flies, with a dark gray to black non-metallic abdomen. Their wings also form a triangular shape, as opposed to the semi-straight line shape that the wings of a housefly have. They lay their eggs in cracks in the soil and the eggs hatch in about three days. [Click the name of each fly to be taken to a photo, recipe, or video.] Getting rid of them shouldn’t be hard if you take the right steps. I have noticed out on country walks that flies like to gather on metal gates. They do not like cold environments, as that could kill them. Caution needs to be taken however in older buildings particularly, there may be other creatures such as bats that could be affected. Cluster fly larvae (or maggots) have long, wedge-shaped bodies that are cream colored. They can also be used to kill cluster flies. If you think that you may have a cluster fly infestation, please feel free to contact Rentokil and we will be more than happy to help and advise on a cluster fly or any other fly problems you may have. Also, a cluster fly has a wider wingspan than a regular housefly. There are a few other cluster fly species that vary slightly in size and colour, but the common cluster fly is the one you’ll be mostly likely to find in your loft space. The surfaces were always in the sunshine and so must have presented a lovely warm place to rest. As the cooler evenings arrive they will crawl into crevices or under the eaves and fascias into roof spaces and may start to gather in lofts or wall voids – quiet, undisturbed areas where they can eventually hibernate safely in the warm over winter. As for the chemical-based pesticide, you can simply buy one from a store and spray it into the spaces where the cluster flies reside. Cluster flies will lodge in-between the cracks in your walls or wooden structures, as they prefer tight spaces to open areas. around windows as they are attracted to light during the day, but they will then move and hibernate in roof spaces at night. The cluster fly is a parasite of earthworms and breeds outdoors in lawns and fields during the spring and summer. This is how to get rid of cluster flies naturally. Female Cluster Flies lay their eggs in cracks in the soil, which hatch in three days. The adults on the other hand feed on nectar and plant sap, fruits, flowers, and several forms of organic matter. 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