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Facts About Drain Flies (Moth Flies)

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Adult drain fly resting on a surface.

Drain flies or moth flies are extremely small and accumulate around showers, bathtubs, sinks and floor drains. They are harmless, but may be persistent annoyance

Features

  • Small flies
  • Size is 1/8 inch
  • Usually black and may be brown
  • Wings have unique patterns of veins
  • Do not bite humans or transmit human disease
  • Feed on organic matter and sewage

Habitat

  • Sewers
  • Kitchen
  • Sinks
  • Shower
  • Bathtub drain
  • Septic tanks
  • Soil that contains sewage

Life Cycle

  • Complete metamorphosis: (egg, larval, pupal and adult)
  • Eggs – Deposit egg masses on moist soil and sides of the drain
  • Larval – Resembles mosquito larvae and found in the top centimeter of waterlogged soil
  • Pupa – Two respiratory trumpets that look like small horns
  • Adult – Dense hair-like scales present along the wing veins and lives to 14 days

Prevention Tips

  • Clean pipes that are frequently flushed out
  • Keep an eye out for standing water

If you have a problem with drain flies, contact Ridpest today to get a quote.

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