Fungus Gnat

Natural Habitat

Moist environments rich in organic matter, such as houseplant soil, greenhouses, and damp areas of gardens.

Diet & Feeding

Larvae primarily feed on fungi, algae, and decaying plant matter in the soil; adults typically do not feed or consume liquid nutrients like nectar.

Behavior Patterns

Adults are weak fliers often seen running across surfaces or flying in erratic patterns near light sources. They have a short lifespan of about one week as adults.

Risks & Benefits

Mostly a nuisance pest in homes. While adults are harmless to humans, high populations of larvae can damage the roots of delicate houseplants, though they also assist in decomposing organic matter.

Identified on: 5/20/2026