Fungus Gnat
Scientific Name: Belongs to genera like Bradysia, Sciara, or Mycomya, depending on the specific species.
Order & Family: Order: Diptera, Family: Sciaridae (dark-winged fungus gnats) or Mycetophilidae (true fungus gnats). Given the small size and common occurrence in indoor settings, it is likely Sciaridae.
Size: Adults are typically 2-8 mm (0.08 to 0.3 inches) in length, often appearing as tiny, dark, mosquito-like flies. Larvae are slender, white, and up to 6 mm long with a distinct black head capsule.
Natural Habitat
Moist soil of houseplants, greenhouses, compost piles, and other damp, organic-rich environments. They thrive in high humidity.
Diet & Feeding
Adult fungus gnats typically do not feed or feed on liquids like water. Larvae feed on fungi, decaying plant matter, and sometimes plant roots, especially in moist soil.
Behavior Patterns
Fungus gnats are typically attracted to damp environments, especially those with decaying organic matter, fungi, and moist soil. They are weak flyers and are often seen hovering near plants or surfaces. Larvae feed on fungi and decaying plant material in the soil. Adults are short-lived and primarily focus on reproduction.
Risks & Benefits
Potential Risks: Larvae can damage the roots of houseplants, especially seedlings and young plants, leading to wilting or stunted growth if infestations are severe. They are generally considered a nuisance pest indoors. Potential Benefits: In outdoor environments, they can play a minor role in decomposition.
Identified on: 8/24/2025