Females are typically longer than males, but both sizes depend on the food available. On an average they are 1/6 inch long. Females also have a broader space between their reddish eyes. Both have sponging mouthparts. The abdomen is gray or yellowish with dark markings, with males having a yellow underside. Body covered with fine hairs.
This is a fast life cycle normally complete within 14 days if prime environmental conditions exist. A female deposits white egg clusters numbering about 75-150 eggs over a three-day period; resulting in a total of 500 eggs. The eggs are laid in moist, organic debris including manure and contents of trashcans. The white, legless larvae (commonly referred to as maggots) feed on the debris and can reach 3/8 inch in length over a 3-7 day period. The larva moves to a cooler area to pupate constructing a case from its last molting skin. After 3-4 days, a docile adult emerges. Normal activity begins in about 15 hours.
Areas of filth. Piles of garbage, animal feed or manure.