Drain Fly

Natural Habitat

Damp areas with organic matter, such as drains, sewage pipes, and compost piles

Diet & Feeding

Larvae feed on decomposing organic material, fungi, and bacteria; adults feed on liquid carbohydrates

Behavior Patterns

Poor fliers that often crawl on walls; larvae develop in the gelatinous film found in drains

Risks & Benefits

Considered a nuisance pest that can spread bacteria from drains to surfaces; beneficial in the ecosystem as decomposers

Identified on: 12/26/2025