Flesh flies are medium-sized (1/2 inch long), black, and have a reddish-brown abdomen. They often fly in swarms and are most easily identified by their size and their reddish-brown abdomen.
The best way to get rid of flesh flies is to eliminate their food sources by thoroughly cleaning your kitchen and bathroom. You can also use commercial fly traps or bait. If you have a severe infestation, you may need to call a professional exterminator.