Undetermined; potentially a Drain Fly (Moth Fly) based on typical indoor domestic finds

Scientific Name: Psychodidae (family level identification)

Order & Family: Order: Diptera; Family: Psychodidae

Size: 2mm to 5mm (approximately 1/16 to 1/12 inch)

Undetermined; potentially a Drain Fly (Moth Fly) based on typical indoor domestic finds

Natural Habitat

Found indoors in moist areas like kitchen sinks, bathroom drains, and sewers, or outdoors in shaded, damp areas rich in organic matter.

Diet & Feeding

Larvae feed on the gelatinous film of bacteria and organic matter (biofilm) in drains. Adults typically feed on liquid carbohydrates like nectar or polluted water.

Behavior Patterns

Poor fliers; they often crawl on walls or hop rather than fly long distances. They are most active at night and are attracted to light.

Risks & Benefits

They do not bite or transmit diseases to humans. While they are considered a nuisance pest, their larvae are beneficial to the indoor ecosystem as they help break down the organic material and sludge that clogs drains.

Identified on: 4/15/2026