Drain Fly Larva

Moist environments containing organic matter, such as sewer pipes, bathroom drains, kitchen sinks, and compost piles.

Decomposing organic matter, slime (biofilm), fungi, and bacteria found in drains and septic systems.

Larvae are sub-aquatic and can survive in low-oxygen environments by using a breathing tube. They mature into adults in about 9 to 15 days depending on temperature.

They generally do not bite or transmit diseases to humans but can be a nuisance. They provide a minor benefit by helping to break down organic clogs in plumbing, though large infestations indicate cleaning is needed.