A 15 Gramm Sparrow can smash through the windshield and blind the pilot.......why do you think a thing made out of hard materials rather than flesh and muscles would need to be so much heavier?
Some helicopters cruise at 120 or even 150 knots-thatīs close to 300 Km/h....
Ever hit a big bug while riding a motorbike on the highway at 200 K/h?