Drain Fly

Damp environments rich in organic matter such as drains, sewers, septic tanks, and wet compost.

Larvae feed on the gelatinous film of bacteria and organic debris (biofilm) in drains; adults primarily consume nectar or liquid organic matter.

Poor fliers that often crawl on surfaces; they are most active at night and are frequently found resting on bathroom or kitchen walls.

They do not bite or transmit diseases to humans, but their presence can indicate a plumbing issue or hygiene problem; they help decompose organic waste in pipes.