Pest Guides

Moth Fly (also called drain fly)

Psychoda spp

Appearance

Image of Moth Fly [Psychoda spp] | Ehrlich Pest Control
  • Adult – 3/16" in length. Grey coloured fly with hairy wings – which make it look like a moth.

Lifecycle

  • Moth flies lay eggs in a mass of 30 to 100 which hatch in less than 48 hours.
  • The larval stage lasts from 9 to 15 days and the pupal stage lasts from 20 to 40 hours.
  • Adult flies may live about 3 weeks.

Habits

  • In homes, moth flies usually originate in sink, bathtub, shower, or floor drains, especially drains that are seldom-used or slow-running. The larvae feed on sediment, decaying vegetation and microscopic plants and animals.

 

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