Protection of Cherry Trees from birds

Marguerite is quite right, the only way to keep off the birds completely is to net the trees. All the other ideas work sometimes with some birds but netting works all the time. 20 cherry trees is a lot of fruit, and if you are not using this as a commercial venture, but for personal use you might want to consider netting just a few trees and leaving the rest for the birds. My grandmother had 1 cherry tree and it produced enough to keep her freezer full every year. MMMM cherry pie!!!

I suppose you could just net a few branches, after all you'll get an awful lot of cherrys from 20 trees!