Pest Guides

Cluster Fly

Pollenia rudis


Cluster Fly
  • Cluster flies are 6–10mm in length.
  • Cluster Flies have a dark grey–olive thorax clothed with crinkled golden–brown hairs.
  • Their wings overlap when at rest, and are sluggish in flight.


  • The Eggs of Cluster Flies are laid in soil.
  • The larva of Cluster Flies develops in earthworms.


  • These species of flies are often found in large numbers in roof voids in Autumn where they hibernate.