Housefly

The housefly (Musca domestica) is a fly of the suborder Cyclorrhapha. It is believed to have evolved in the Cenozoic Era, possibly in the Middle East, and has spread all over the world as a commensal of humans. It is the most common fly species found in houses. Adults are grey to black, with four dark, longitudinal lines on the thorax, slightly hairy bodies, and a single pair of membranous wings. They have red eyes, set farther apart in the slightly larger female. Adult houseflies are usually 6 to 7 mm (0.24 to 0.28 in) long with a wingspan of 13 to 15 mm (0.5 to 0.6 in). The females tend to be larger winged than males, while males have relatively longer legs.