Cluster flies – information, images and how to get rid of them

Cluster flies – information, images and how to get rid of them ;

cluster flies are large black colored flies with the scientific name ‘Pollenia rudis’, which appear in households from late autumn to spring.

A Cluster fly is very similar to a housefly.

group flies come from the ‘Calliphoridae’ family. This is the same family to which they belong bottle blow flies or .

group flies are also known as attic flies . This name describes its characteristics very well that is, the tendency of clustering in large numbers inside attics.

Unlike blowflies, flies group are not played inside and so the homeowners do not have to worry about flies from the corpse of a dead animal or any other objectionable material in the attic or walls.

group flies come in the summer or fall. Often in large numbers, they enter houses in order to find some warm places where they can hibernate. These flies do not bite humans and are strictly parasites of earthworms.

Cluster flies Fact Sheet:

cluster fly

Now let’s see some important information about cluster flies:

physical appearance:

the physical appearance of a fly cluster is much like home or a bottle of flying. adult group flies are dark gray and about 8 to 10 mm long. Yellowish hairs have gold in his chest. The abdomen of a fly cluster has a checkered pattern of dark and light prominent.

Unlike houseflies do not have dark stripes on the thorax and they do not have bluish or greenish color as those with metal bottle flies bodies. At rest, the two wings of a flying cluster overlap through the abdomen.

and may emit a sickly smell, sweet as honey buckwheat if you are upset. Another important feature of flies group is that they are slow and slow.

Habitat and behavior:

As soon as the fall approaches, cluster flies begin to enter houses and buildings in large numbers. At this time of year, the days get shorter and the temperature begins to fall, thus enter human homes in search of overwintering sites.

And because during this time the west and south facing buildings are exposed to more sunlight, so flies group are more attracted to these buildings, due to the heat can get there . They enter these buildings through small openings or cracks and crevices around window frames or doors open or unscreened windows / vents.

Once inside gather in a secluded, secure, such as attics or false ceilings and begin to hibernate. Generally, these sites are south or west sides of the buildings above. Once the temperature returns to cross 12 degrees Celsius to become active.

If the temperature inside the building is manually controlled above 12 degrees Celsius, the group flies can go thinking it’s spring. Cluster flies are strongly attracted to light, so that they also can be found near windows and near the lamps at night.

eating habits

group flies are not harmful to the property, enter buildings in the fall just to hibernate and nothing else. They have bite pieces fitting as horseflies or mosquitoes . Unlike flies, blow flies group are not associated with animal carcasses, feces, or woollens.

cluster flies are strictly parasitic earthworms. After hatching eggs cluster fly larvae found and buried in the body of an earthworm to feed. The poor worm does not usually survive the experience.

Life Cycle:

In general, for every season there are at least three to four generations of flies group. The beginning of a cycle typical cluster fly life begins after the adults leave their overwintering sites more in the spring and lay their eggs in the soil containing earthworms. The eggs are deposited mainly in the cracks in the floor.

After 3 to 4 days, these eggs hatch and the larvae (grubs) enter the body cavities of earthworms. These larvae feed on earthworms host for a few days. The worm flies group stage lasts about 13 to 22 days.

After this move and pupae in the soil. pupa state lasts 11 to 14 days after which adult flies out and are ready to begin the cycle again. The total life cycle of a fly cluster is 30 -. 50 days


  • They are regarded as a nuisance mostly because of its habit of hibernating inside human homes. But they do not cause any damage to homes.
  • These sometimes flies leave small dark spots of excrement on the walls or windows, but these points are not known to carry human disease-causing organisms.
  • flies group can provide a strange odor when disturbed.
  • Also, if the flies die in holes in the walls, which can attract beetles pantry.

difference between a house fly, Bottle Fly and Fly a cluster:

Cluster fly is very different from a home or a bottle / blow fly . The following characteristics can help distinguish between a house or bottle fly up a cluster: clusterfly-vs-housefly-vs-blowfly

Cluster flies (8-10 mm) are larger in size than a house fly (6-7 mm) but smaller flying a bottle (10 to 14 mm). Cluster flies are a little darker and have pattern of dark and light in your abdomen that houseflies or bottle flies do not have pictures. Cluster flies have hairs yellow or gold and short of his chest.

Apparently flies bottle can be easily distinguished from the other two types of flies as they have a greenish or bluish metallic body. Another important aspect that can differentiate between a cluster and fly housefly is the speed of movement. House and bottle flies lightening fast while cluster flies are slow and slow.

If a fly resting cluster look closely, you will see its wings overlap, while housefly wings remain separate during rest. group flies enter houses in order to find a warmer place to hibernate while flies enter human homes in search of food and water.

Preventing Cluster Flies:

The best way to avoid Cluster flies are mechanical exclusion. Cluster flies can enter houses through or smaller around door frames and window cracks through any small opening unsealed.

To prevent fly infestation cluster could use these tips:

  • Fill all cracks or crevices in the walls, door frames and windows with caulking. Be sure to seal all possible holes or the like crack. (Around – windows, doors, siding, behind chimneys, plumbing services, below the fascia, etc.) in the building
  • If damaged screens on doors or windows should be repaired or replaced.
  • Try installing insect screening or nets on the air vents in soffits.
  • In addition to the suggestions above also could be used pyrethroid or neonicotinoid synthetic insecticides (bifenthrin, cyfluthrin, lambda-cyhalothrin, cypermethrin, deltamethrin, sumithrin, tralomethrine, dinotefuran etc) in the south and west walls of their homes group deter flies. But be sure to reapply after every 2 -. 3 days

How to get rid of flies Cluster

In this section, we will see how you can get rid of flies cluster after they have had access to the interior of your home. In such situations you can use the following methods:

The use of insecticides Sprays:


Once flies group they have entered their home and they have identified the infested site, then this is the best method you can use to kill them.

Scientific studies have indicated that insecticides pyrethrum spray deck are very effective in killing flies exposed during the winter months and spring. These insecticides pyrethrins are made from extracts of natural plants and are therefore safe to be used indoors.

Such insecticides based on pyrethrins are also safe for pets and are effective against a large majority of flies and pests. But please be sure to clean the dead bugs because there is a possibility that these dead flies can attract carpet beetles first feed on dead insects and wool subsequent attack.

You can check out this pyrethrin-based insecticide on Amazon .

Use of Mini Vacuum Cleaner (my favorite method):


As we know, flies group come into our homes in order to find places where they hibernate and therefore during this period are slow and slow. And because they are slow it could easily use a mini vacuum to catch them.

This is my favorite method because it is simple and does not require you to deal with chemicals or disaster. For this task, I have Black Decker BDH2000PL that is lightweight, portable and gives the proper suction power.

can be extracted Black Decker BDH2000PL here on Amazon .

. Note: Please be sure to clean your vacuum cleaner after use, otherwise flies group may release an unpleasant odor inside the vacuum bag ground

The use of UV light traps:


Another way to get rid of cluster flies is the use of ultraviolet light traps. These bright light traps consist of a small UV lamp but high intensity and adhesive adhesive strips. Cluster flies are attracted to UV light and as soon as they land on the lamp get stuck in the adhesive strips.

The adhesive strips are replaceable and can be replaced after a few days or months. This type of fly traps consume 9.12 watts of power and are effective in 600-800 square feet.

Check it on Amazon, which has a lot of positive feedback .

Use of Cluster Buster:


Cluster Buster is a revolutionary product to get rid of flies Group. Most people say it works like a charm against flies group. Only the trap must be held within the glass of any window near the infested area. The traps are filled with finely ground (powdered) egg shell super.

There is also a cross section at the top of the trap. Outside light when it enters the trap, then the translucent walls of the trap emits light that attracts flies group. Once the flies fall into the trap and land on the egg shell powder, which actually sink into the dust as it is very light and fluffy and therefore a “quicksand effect” occurs.

The eggshell powder clogs the openings in the cluster flies respiratory system and therefore killed him instantly. These traps are nontoxic and one trap can be used for 2 -. 4 years and can kill up to 1000 flies

Output Cluster Buster on Amazon .

Therefore, it was this group flies and methods that can be used to get rid of them. We will not know their stories or any other method that could be useful against flies group.

Greetings :)

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