Size:
Range from 3/8 to 1/2-inch in length.

Behavior:
The life of a flesh fly usually begins in the decaying flesh of a dead animal, regardless of the state of decomposition. They also lay eggs in dumpsters in various decaying materials as well as manure. Some species even lay their eggs in the wounds of mammals. The larvae, commonly known as maggots, are cream-colored and have a greasy texture, live for 5-10 days in these environs before descending into nearby soil where they mature into adulthood.

A few species of flesh flies can lay so many eggs on an animal carcass that is becomes a squirming mass of maggots when the eggs hatch. As disgusting as this sight may be, it is also beneficial because these maggots help accelerate the natural decomposition process and cycle of life by re-depositing nutrients back into the soil.

Habitat:
Adult flesh flies emerge during the summer and are very common outdoors, though they may be attracted to a dead bird or rodent that may have died in the attic or elsewhere indoors. Flesh flies are usually attracted to buildings by food odors, and may enter through an open door or window. They are common around farms where they are attracted to fresh animal dung, and around meat processing plants, dumps and other locations where decaying matter is abundant.

Interesting Fact:
The life cycle of the flesh fly is very predictable. Because they are the first to arrive on the scene of a dead mammal, they are often used by forensic entomologists to pinpoint the time of death in homicides in a process called back extrapolation.

This is done by determining the oldest larvae of each species of present, measuring the specific temperature, and then calculating the earliest possible date and time for the deposition of larvae. This yields an approximate time and date of death.

Control:
If flesh flies become a nuisance, the first step in eliminating them is sanitation. Keep dumpsters and trash containers away from buildings and their lids tight. If there is a rodent problem present make sure to dispose of any rodent carcasses as soon as possible. Since flesh flies feed and breed on dead animals and garbage, it is best to locate and eliminate all possible breeding sources.

Locate and seal any cracks any cracks around doors and windows. Most flies can fit through very small openings and become an indoor pest. Make sure all screens are fit tightly and are free of holes. All windows and doors should fit properly. Dispose of discarded food and garbage immediately in tight-fitting containers.

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