I can't imagine a pilot losing control of his aircraft dodging a bird. Most of my encounters were below 3,000 ft AFL and in a turkey vulture infested valley. I am sure if I had just flown through them I would have had many engine failures as had many of our management pilots. They were check airmen and doing a lot of inside the cockpit instructing so were distracted. Any pilot that flies through a flock of big buzzards thinking luck will be with him and not bother to avoid them will be in for a big surprise and a grounded airplane. Hope luck is on your side. Avoidance really isn't that hard. I have been below 1,000 ft on final fully configured with a buzzard in my path so avoided him first and then decided if I could still land or had to go around. Sully probably never saw the geese or he wouldn't have made history.