Here are pictures of incredible damage that can be caused when a small bird strikes an airplane or helicopter. Though the majority of birdstrikes cause little damage to a plane, they do result in a great number of bird fatalities.
The image above is scenic only at first glance. Facing a huge flock of birds during takeoff or landing will evoke sweaty palms in most pilots – and passengers probably.
A single bird, caught in a plane’s engine, can cause quite a bit of damage and might even force an emergency landing. But especially dangerous for planes (and birds!) is getting into the middle of a whole flock.source