ken, can you trust Wickipedia?
"The name blow-fly comes from an older English term for meat that had eggs laid on it, which was said to be fly blown."
Thar she blows.
hortster

so one could say.. they all come from the ROTTING MEAT GROUP ...

this became a curiosity back in the day.. when CSI was a good crime show.. and they were always referring to such ... for the time/day of death ...

ken

These are also the maggots of the medical world...as they will only eat the diseased flesh of a wound, cleaning it out very efficiently.