Drain Fly

Moist areas such as sewage systems, bathroom drains, sinks, and damp soil

Larvae eat organic matter, bacteria, and fungi in gelatinous films; adults feed on nectar or polluted water

Night-active flyers; they have a characteristic jerky flight and are often seen resting on walls near drains

Generally harmless to humans but can be a nuisance and potentially transport pathogens from sewage to food surfaces