Drain Fly Larva

Natural Habitat

Larvae are found in moist environments with organic matter, such as drains, septic tanks, grease traps, and sewage areas.

Diet & Feeding

Larvae feed on the gelatinous film of bacteria, fungi, algae, and decaying organic matter found in drains and sewers.

Behavior Patterns

The larvae live submerged in organic film; they have a small breathing tube to take in air from the surface. They undergo four larval stages before pupating.

Risks & Benefits

Generally harmless to humans but can be a nuisance in homes; they benefit the ecosystem by breaking down organic waste, though large numbers indicate plumbing or sanitation issues.

Identified on: 1/4/2026