Pest Guides

Yellow Swarming Fly

Thaumatomyia notata


Yellow Swarming Fly
  • Small approximately 3mm in length (similar to a fruit fly).
  • Adults are bright yellow with black longitudinal stripes on thorax and black transverse stripes on abdomen.


  • Often found hibernating in attics with cluster flies.
  • Little is known about these flies, however theie larvae feed upon aphids associated with grass roots.


  •  Often found in large numbers in roof voids in Autumn where they over–winter.