While flying out from the last island in the helicopter showcase I spotted a seagull flying very close to me as I was RTB. Shortly after my main rotor, engine and instruments got very damaged. The helicopter was still airworthy, but barely.
I tried to reproduce it, but it is VERY hard to fly into a bird. Hence I do not know if this is already a feature or if I was hit by small-arms at the same time.
Enable bird collisions with resulting engine failure, not explosions, but close.
It would make extremely interesting gameplay when you suddenly lose air support/transport due to a bird collision. It would randomize difficulty more and add, according to me, more realism to a great game.