Family Psychodidae, commonly known as "moth flies" or "drain flies", are small, hairy flies that belong to the order Diptera. These flies are characterized by their thick bodies, large wings, and hairy appearance. Some common synonyms for the family Psychodidae include the names "owl midges", "sand flies", and "filter flies". In addition to their distinctive physical features, these flies are also known for their unique breeding habits. Many species of Psychodidae lay their eggs in moist or damp areas, such as drains, stagnant water, and damp soil. Despite their nuisance status as household pests, many species of Psychodidae play important ecological roles in their natural habitats.