Fungus gnat (likely)

Moist soil, decaying plant matter, compost, and indoor potted plants; adults often occur near windows and lights.

Larvae feed mainly on fungi, algae, and decaying organic material in soil; some may nibble plant roots. Adults consume little, mostly liquids or nothing.

Adults are weak fliers and commonly run or hover near soil and windows. Females lay eggs in damp potting mix, where larvae develop before pupating.

Generally harmless to people and pets, and adults do not bite. Larvae can damage seedlings and houseplant roots, while also contributing to decomposition.