Crows and Ravens, as stated, are the Enrico Fermis' of bird land.
Get smart on the clean up side. We have so many birds all around the farm that the cars and equipment do take a hit.
I bought this:
https://www.amazon.com/dp/B07M7L1WKK?tag=duckduckgo-ffsb-20&linkCode=osi&th=1&psc=1
Battery powered, suctions water from a bucket (or lake water), just the right PSI. I have a gas powered pressure washer I'll probably use once a year now.
Great for house uses as well.
Edit: In Washington State, the capitol of tree/fruit in this country, crows and Ravens laugh at wind chimes, random air guns that sound like rifles, etc. The tree/fruit folks have tried everything.
They adapt, over come: Clint Eastwood with wings.