I think the best way to avoid birds is to look as far in front of your windscreen as possible and not let those little dots become big dots so your evasive action can be minimal, not drastic. It always worked for me. We somedays had to dodge hundreds of big buzzards in multiple flocks by using this technique. I know cockpit workload can make this difficult but getting the busy work done before entering the bird infested area can give you more time to see and avoid them. My neighbor was killed in his F16 hitting a turkey buzzard at 500 ft at high speed when it hit his canopy and knocked him out.