Drain Fly Larva

Natural Habitat

Moist environments with organic buildup, such as drains, sewage pipes, septic tanks, and wet compost.

Diet & Feeding

Decomposing organic matter, algae, bacteria, and fungi (biofilm) found inside plumbing and moist areas.

Behavior Patterns

The larvae live within the gelatinous film of drains; they are remarkably resilient to soap and hot water. They undergo complete metamorphosis into small, fuzzy, moth-like flies.

Risks & Benefits

They do not bite and are not typically known to transmit diseases to humans. While they help break down organic sludge, their presence usually indicates a hygiene or plumbing issue (clogs/buildup) that requires cleaning.

Identified on: 3/12/2026