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Cluster Fly

Cluster flies are related to the common house fly but have very different breeding requirements. These annoying pests emerge in the winter, after a thaw, from over wintering hiding places in wall or ceiling voids.

Facts About Cluster Flies:

  • As the days begin to shorten in August cluster flies look for over wintering locations in homes and tree hollows
  • Prefers to hibernate on the side of a structure that gets the most sun, usually the southwest exposure
  • Lays eggs in the soil, especially in grassy areas like parks and golf courses
  • Larvae hunts in the soil and parasitizes earthworms for food before becoming an adult
  • ¬†Emerges in the winter when the walls or voids warm up tricking the insects into coming out of hibernation.

 

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