Drain fly larva

Natural Habitat

Found in moist areas with organic decomposition, such as bathroom or kitchen drains, sewers, and septic tanks.

Diet & Feeding

Larvae feed on the nutrient-rich slime, bacteria, fungi, and decomposing organic matter found inside pipes and drains.

Behavior Patterns

The larvae live within the gelatinous biofilm of drains; once they reach maturity, they pupate and emerge as small, moth-like adult flies.

Risks & Benefits

While they do not bite or transmit diseases to humans, large numbers indicate a clog or organic buildup; they help break down organic matter but can be a persistent household nuisance.

Identified on: 5/18/2026