GENERAL IDENTIFICATION

The Cluster Fly is a common pest across Canada and most of the United states, as well as in Europe and in certain other parts of the world.  The name comes from this insect's habit of forming clusters of individuals that overwinter in attics and wall voids of buildings.  As the temperature increases in the spring, their winter-dormancy is broken and they start to actively seek the light in their attempt to get outside again in order to mate.  As a result they are frequently found on window panes during the spring period, and also again in the early fall, when they re-enter the buildings.  The adult fly is approximately 8mm long and appears as a 'tubby' dark grey fly with many golden hairs on its body.  The females lay eggs on the soil and the emerging larvae then parasitize earthworms.  When development and metamorphosis are complete the adults repeats the process, usually resulting in about 4 generations a year.  It is interesting to note that they often return to the same building to hibernate every year. Compared to the House Fly their movements tend to be more sluggish.

On completing this request form, you will receive a detailed monitoring guide providing you with information on trap placement, assessment of larval damage and how to record and act on the information that you get. This will take away much of the guesswork, help to prevent wasted treatment and keep you in control of the pest situation throughout the season.

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