Flies you say? Wow, finally a use for the clusterflies that were imported here and have become quite a nuisance by the literal ton. (seriously huge biomass here, probably rivals that of the ants by this point). I have always been amazed by their limitless energy and durability. Thing is they eat pollen, not meat. Well their larvae eat meat (worms - the reason they were imported). I suspect the clusterfly pollen consumption competition as a factor in domesticated and wild bee population declines.
I could be rich! Rich I say! Muahahahaha!