Drain Fly

Drains, sewage systems, septic tanks, and moist areas where organic matter decomposes

Larvae feed on the gelatinous film of organic debris, bacteria, and fungi found in drains; adults primarily consume liquids and nectar

Poor fliers that often move in short, jerky hops; they are most active at night and typically lay eggs in the moist slime of plumbing fixtures

Generally harmless to humans as they do not bite or transmit diseases, but large populations can be a nuisance and may indicate plumbing issues or sanitation needs