Psychodidae, commonly known as moth flies or drain flies, are small, hairy insects often found near stagnant water or decaying organic matter. They are typically gray or brown and have a distinctive appearance, resembling tiny moths. These flies are most active during warm, humid conditions and are often seen fluttering around sinks, drains, and bathrooms. While Psychodidae are generally harmless to humans, they can be a nuisance due to their presence in homes. They breed in moist environments, making proper sanitation and drainage important for controlling their populations. Understanding their habits can help in managing these tiny pests effectively.