Family Sarcophagidae
Characteristics
Size: Medium-sized flies from 1/4-inch to 1/2-inch
in length.
Color: Dark gray with three stripes
on top of the thorax in front of the wings; eyes are usually red;
a checkerboard pattern is often present on top of the abdomen.
Behaviour
Like blow flies and bottle flies, flesh flies are important scavengers
in nature as they are one of the first insects to reach a dead animal.
These flies are part of the decomposition process that recycles
nutrients back into the soil. The maggots of these flies may be
used by forensic entomologists to place the time of death in murder
cases. They also breed in garbage containers and dumpsters.
Habitat
These flies are extremely common and can be found one to a few at
a time in homes or businesses during the warm summer months. They
are attracted to buildings by food odors and also warm/cool air
currents emitted through cracks around doors and windows, or through
doors propped open for ventilation purposes. The sudden appearance
of dozens of flesh flies within a building signals a potential dead
rodent, bird or other animal in the wall, ceiling, attic or crawlspace.
Tips for Control
In most cases involving blow flies and bottle flies around homes,
the problem is twofold: (1) flies are being attracted to the building
by trash containers or pet manure and (2) openings (e.g. doors)
exist that are permitting flies to enter. To minimize problems with
flies, take the following steps:
-
Throw trash away in trash cans in plastic
bags. Bags reduce odors associated with garbage and trash thus
attracting fewer flies to the area.
-
Locate trash receptacles as far from the
building as possible. Those flies that are attracted to the
area will therefore be away from the back door.
-
Keep doors and windows closed unless they
are equipped with tight-fitting screens.
-
Ensure all edges of doors and windows have
tight weatherstripping. Flies can squeeze through amazingly
small cracks.
If the presence of these flies is due to a dead
animal within the building, finding the location of the carcass
and its removal is necessary, but is not easily accomplished. |