Adults are about 1/8-1/4 inches long, with the female being larger than the male. They are dull gray, with the face having 2 velvety stripes, each silver above and gold below. The thorax has 4 narrow black longitudinal stripes on dorsum. Mature larva about 1/4-3/8 inches long. They are eyeless, legless and taper from the head back. They are a cream color. House flies have been known to migrate up to 20 miles, most stay within 1-2 miles of where they were hatched. Females seek almost any warm, moist material with sufficient food for larval development for egg-laying purposes. During the day, house flies tend to rest less than 5 feet from the ground on walls, floors, and various objects. At night they rest primarily above 5 feet on ceilings, walls, plants, etc. Their night resting place is usually near their daytime food source.