Fly straight and level
Birds are well better than planes for avoiding actions. They can dive or turn so quickly... Attempting anything on your side can jeopardize THEIR avoiding action.
Regarding the result, this ranges from bumps on the fuselage to dead (and possibly in pieces) bird in your cockpit, via an obstructed windshield.
A friend of mine once had a birdstrike with a Robin (wood and fabric), and after landing the legs of the bird were still hanging outside the leading edge...