speed difference

Scientific explanation for the case of birds colliding with aircraft causing serious damage
On the evening of September 30, an Airbus plane landed in Noi Bai (Hanoi) in the condition of a distorted nose, forced to stop mining for repairs.
Why can birds drop planes?
The US Airbus 320 today plunged into the New York River with the original cause determined by the flock of the geese.