The flesh fly is found near carrion, excrement, and decaying organic matter. It has a characteristic checkerboard pattern to the abdomen and has 3 dark stripes on the thorax. These flies can get quite large. Instead of laying eggs, flesh flies give birth to live maggots, which are either deposited or dropped mid-air. I was once standing in a motel room in Costa Rica and a flesh fly deposited a larva on my arm. Within less than a minute the larvae began to attempt to bore into my skin.