I could be wrong but I don't think there is mandatory reporting of bird strikes which don't cause an incident. I've had a few which did not cause damage although presumably the bird would have got killed. One must tell ATC immediately so they can check the runway for debris (leftovers of the bird, or perhaps something that came off your plane before you got a chance to check it, which could damage the landing gear of the next plane landing after you). You can't avoid a bird hitting you by maneovering; all you can do is leave the lights on after takeoff and most birds won't go near you anyway.