I'm vaguely familiar with the introduction of the phorid fly to the southeast, and what you say above seems to match my very sketchy understanding.The phorid fly is endemic to North America isn't it? Was it not Sanford Porter, a research entomologist with USDA, who brought the phorid fly to the southeast to battle fire ants? I'm surprised we don't see more of it.
First, we introduce lizards to eat the flies. Then, we introduce snakes to eat the lizards. After that, we bring in snake-eating gorillas to eat the snakes, and in the winter the gorillas will simply freeze to death!So what do we introduce to kill the phorid fly, then?