Had a good one back in 1993 landing in Prestwick in a DC8-73. Just as i rotated the nose in the flare a pair of Skylarks flew in to one of the two air cycle machine inlets on the nose of the aircraft (about 4 x 6 inch area). The wise and senior aircraft commander accused me of aiming for them, just to get a wonderful night in the Caledonian Hotel!
On a serious note if you are coming towards birds and you have the time to observe them you can tell the relative size of the bird by the frequency of wing flap movements - big bird long slow wing flaps, small birds the ooposite. This might prepare you for the magnitude of the splat.
The best strategy to maneuver to avoid birds is to pull up (don't stall!).
The above two pieces of information are from research work by many respected biologists and are contained in the the new Transport Canada bird strike book "Sharing the Skies" to be published later this year. A great book for all the members of the industry.
And no I don't get any royalties!