It would be a big impact on the ecology if we had such thing existing. Catching birds means that the predators on the ground will suffer 'missing-bird-food'. Plus, it means that vultures are going to become extinct and they make up one of the most important scavengers.
And, I don't think that CPs will start flying. Since insects cannot stand the freezing temperature of the atmosphere, they fly low. (We already know that) IF we fly, we do not need to use insecticide at all since no insects will bug us at all. therefore, there will be lots of insects and CPs will breed and germinate like mad, getting a daily basis of breakfast, lunch and dinner all day long. I wouldn't be suprised to find rajah growing on the LL conditions.
On the other hand, iron man will suffer hardships escaping the bad guys.......
Cheers