Drain Fly Larvae

Natural Habitat

Commonly found in damp areas with organic buildup, such as sink and shower drains, sewage filters, and compost piles.

Diet & Feeding

Feed on organic matter, sludge, and microfilm (bacteria, fungi, and algae) that accumulates in drain pipes.

Behavior Patterns

The larvae live within the gelatinous film of drains and breathe through a small siphon. They pupate near the surface of the film before emerging as adult flies.

Risks & Benefits

Direct risks to humans are low as they do not bite; however, their presence indicates organic buildup and poor sanitation. They can potentially transport pathogens from sewage to food surfaces.

Identified on: 5/25/2026