The alula is well developed in the house fly. New World screwworm flies share many characteristics of the common house fly. They fed and watered the spiders, giving them a house fly. While looking for a good show to watch, he consumes a passing house fly. Insects were represented by the house fly "Musca domestica". To consume a house fly ("Musca domestica"), even large adult females need almost one hour. The cluster fly is slightly larger than a house fly at 9.525-12.7mm (3/8-1/2 inch) long.