Fly Infestation – Eggs
A female house fly will lay up to 900 eggs in her lifetime, usually in groups of 75 to 100 in a batch. The batches are placed in moist, filthy locations. Ideally placed in human or animal waste, kitchen waste and compost piles. The eggs must stay moist and somewhat warm to hatch. These eggs are small, oval-shaped and whitish in colour. Seeing clusters of these tiny eggs in your home may not mean a fly infestation, but it will after they hatch and pupate.
Maggots are small, white, worm-like larval flies. Often found in the places hatched: warm, moist, filthy places, so they can feed off the material within that location. Maggots will readily feed off nutrient-rich sources, such as manure. The higher the nutrient value, the less they need.
Upon the completion of the larval stage (four to 37 days), in which the maggot will go through three instars, they find a dry, cool place to form their pupal cocoons. They will travel up to 50 to 150 feet to find a suitable location. If laid as eggs within the home, chances are they will likely pupate within the home. Pupation requires two to 27 days. Pupation cocoons could be yellow or black, depending on the age of the pupae.
Seeing one or two flies does not constitute a fly infestation; however, seeing several flies, particularly at one time, may be of greater concern. Upon hatching from their pupal cocoons, flies will dry for about one hour. Pupae that have been in your home will often hatch from these cocoons at the same time, causing a fly infestation of your home. Adults typically live 15 to 25 days, but are known to live as long as two months. The cycle repeats until the flies have been removed; along with the eggs, maggots and ideal breeding locations.