Drain fly (moth fly)

Damp indoor areas, especially around drains, where larvae develop in organic slime; also found outdoors in moist places.

Larvae feed on microbes and decaying organic matter in drain films; adults consume little or no food.

Small, fuzzy, weak-flying adults often rest on walls near sinks or drains. They breed in moist buildup, and adults usually live for about two weeks.

Harmless to people and do not bite or transmit disease; large numbers can indicate dirty or clogged drains.