Do you know ghouls from goblins and ghosts?
flesh fly n.
Any of various dipterous flies of the family Sarcophagidae whose larvae are parasitic in living animal tissue or feed on carrion.
any member of a family of insects in the fly order, Diptera, that are similar in appearance to the house fly but are characterized by blackish stripes on the gray thorax (region behind the head) and a checkered pattern of light and dark gray on the abdomen. Most flesh flies are tropical, although the family is generally widespread. Many species are scavengers, with the larvae developing on either open wounds or carrion. Depending on the species, the female deposits live larvae or eggs