Musca is a genus of flies commonly known as houseflies. They are small, typically measuring about 6 to 7 millimeters in length, and are characterized by their grayish bodies and large, red compound eyes. Houseflies are found worldwide and are often associated with human habitats, where they can be a nuisance and potential carriers of diseases. These flies are known for their rapid reproduction, with a female capable of laying hundreds of eggs in a short period. Musca domestica, the most common species, thrives in warm environments and is often found near decaying organic matter, which serves as a breeding ground for their larvae.