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For Insects, Spiders & Their Kin
For the United States & Canada
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Subfamily Psychodinae - Moth Flies

Thing - Clogmia albipunctata Moth Fly - Clogmia albipunctata Moth Fly Moth Fly - Paramormia Is this tiny creature a moth? - Clogmia albipunctata Psychodidae - Psychoda moth fly - Paramormia corniculata Tiny fly, inside house in winter - Clogmia albipunctata
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Nematocera" (Non-Brachycera))
Infraorder Psychodomorpha
Family Psychodidae (Moth Flies and Sand Flies)
Subfamily Psychodinae (Moth Flies)
Other Common Names
Drain Flies, Sewage Flies, Filth Flies
~2,000 spp. in >120 genera total(1)
1.5‒4 mm(2)
Adults often found around sewage installations, in washrooms/bathrooms, and come to light; larvae live in organic sludge inside drains and sewage pipes; pupae on the same organic film where the larvae live
Larvae feed on algae, fungi and bacteria in sewage and organic sludge; adults feed in polluted water and on flower nectar
Life Cycle
Indoors, females lay irregular masses of 30‒200 eggs in the organic gelatinous film lining drains in bathtubs/showers; eggs hatch within 32‒48 hrs at ambient temperatures ~20ºC; larvae pupate 9‒15 days later; pupa stage lasts 20‒40 hrs; adults live ~2 weeks
Larvae play an important role in purifying sewage in industrial sewage treatment plants. Adults are weak fliers, covering only a few feet at a time in short erratic flights; can be blown considerable distances by wind.
See Also
Trichomyiinae, e.g. Quatiella or Trichomyia spp., may look similar