These little brain-eaters are being carefully investigated to make sure that there ARE no negative consequences to their introduction. Enough environmental mistakes along these lines have been made that now such things are done with care.
Here in Florida, we suffer from two love bug seasons a year. Love bugs are an introduced species of flying insect that were SUPPOSED to eat mosquitoes. As things turned out, love bugs haven't the slightest interest in eating mosquitoes. But their bodily fluids will eat the paint off your car if you don't wash their smashed bodies off fairly quickly. And on top of that, NOTHING eats love bugs, which are apparently so nasty tasting that no bird with a memory will eat two of them. So they have no naturally occurring predators here except for the fronts of cars.
Oh...and they're prolific as hell! Once their season starts, the usual way to find them is in pairs, joined at the crotch, end to end. They fly around that way and usually die in that configuration when they splatter on your car.
They swarm in huge numbers. And perhaps worst of all, they're attracted to hotter areas, so they can be found in the greatest numbers swarming over roadways, which is where they cause the most inconvenience. A thick swarm of them can cake your car's windshield in bug guts within a matter of seconds if you're driving through it, making powerful, good condition wiper blades on your car mandatory. And your washer fluid bottle needs to be full and contain a stronger than usual strength washer fluid.
I'm not kidding about ANY of this.
CJ