Fungus gnat (probable adult)

Damp potting soil, greenhouses, compost, leaf litter, and other moist, organic substrates; adults may wander indoors.

Adults mainly consume little or nothing, sometimes taking moisture or sugary liquids. Larvae feed on fungi, decaying organic matter, and occasionally plant roots.

Adults are weak fliers and often walk or hover near soil and windows. Larvae develop in moist soil; generations may overlap, especially indoors around overwatered houseplants.

Adults are harmless and do not bite or transmit disease. Larvae help decompose organic material but can damage seedlings and roots when abundant.