Small dark-winged fly (likely a fungus gnat)

Moist soil, decaying plant material, compost, greenhouses, and houseplant potting mix.

Larvae feed mainly on fungi, algae, and decaying organic matter in soil; adults consume little, often taking moisture or nectar.

Adults are weak fliers that commonly walk or hover near soil and windows. Larvae develop in damp organic substrates, completing the life cycle in several weeks under favorable conditions.

Generally harmless to people and pets. Larvae assist decomposition but can damage seedlings and roots when populations are high; identification from the image is not definitive.