Pest Guides

Yellow Swarming Fly

Thaumatomyia notata


Image of Yellow Swarming Fly [Thaumatomyia notata] | Ehrlich Pest Control
  • Small approximately 1/8" 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.

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