Red-eyed fruit fly (likely)

Indoors near fermenting fruit, vegetables, drinks, drains, and compost; also common in laboratories worldwide.

Adults feed on yeasts and microorganisms on fermenting organic matter; larvae consume yeast-rich, decaying fruit and plant material.

Rapidly reproduces in warm conditions, completing its life cycle in roughly 8–14 days. Adults are attracted to fermentation odors and commonly swarm around ripe or overripe produce.

Generally harmless to people and does not bite or sting, though it can contaminate food and is a nuisance. It helps decompose organic matter and is a major model organism in genetics and biology.