Drain Fly

Natural Habitat

Humid areas, particularly bathroom drains, sewers, and septic tanks where organic matter accumulates.

Diet & Feeding

Larvae feed on organic sludge and microscopic organisms; adults primarily consume nectar or liquid carbohydrates.

Behavior Patterns

They are weak fliers and often crawl on walls. They are nocturnal and are attracted to light and moisture.

Risks & Benefits

They do not bite humans but can spread bacteria from drains to surfaces; conversely, larvae help break down organic waste.

Identified on: 1/1/2026