Drain Fly Larva

Moist, organic-rich environments such as drains, sewers, septic tanks, and damp soil near plumbing leaks.

Decaying organic matter, sludge, algae, and bacteria found in drain films.

Larvae live within the gelatinous film of drains and are known for their ability to survive in low-oxygen environments. They pupate near the surface of the film before emerging as adult flies.

Generally harmless to humans, though they can be a nuisance in large numbers. In some cases, they help break down organic solids in sewage systems, but their presence often indicates a need for plumbing maintenance of plumbing or drainage systems.