Blow and bottle flies have a very fast life cycle. Their eggs hatch rapidly, often in as little as 8 hours. They lay their eggs in decaying matter, including dead animals. If they are present then most likely there is a dead animal around.
Cluster flies do not breed indoors, rather they move into structures in the fall and hibernate inside attics and wall voids during the winter months. They may become active in early spring, or on a warm winter day, and they will fly to windows and “cluster” there.
Drain, moth fly bodies and wings are covered with scales, which gives them a fuzzy appearance. They have tear-drop shaped wings, which they hold roof-like over their backs when at rest. Adult flies usually stay close to the area where they are developing as larvae, but can be attracted to lights. They breed in material that has built up in drains and their presence usually indicates a clog or poor drainage. They have also been found in structures when there is a moisture problem.
Fruit, or vinegar, flies often have distinct red or brown eyes in some species. They lay their eggs into rotting, fermenting organic matter and are most often associated with spillage or liquids, decaying or rotting fruits and vegetables. They also are attracted to sweet deposits from spilled drinks. Recycling soda cans can attract these flies.
House flies get their name from being the most common fly found around homes. Adult house flies can grow to one-quarter of an inch long and usually live between 15 and 25 days. These flies are attracted to garbage and trash areas.
These flies are yellow-brown with a darker brown abdomen. They have a ”humpbacked” appearance. Often called sewer flies, they are attracted to decaying organic material, buried dead animals, corpses in mausoleums, accumulations of dead insects in water-logged situations, or in the semi-liquid organic materials found in drains.