I have heard of using webbing or netting to protect them.I think there are sweet and sour cherry varieties.This could be the difference.
This is a little freaky but my grandfather would shoot any bird that was molesting the garden and he would leave its corpse in the open.He said it would keep the other birds away.He only shot crows or blackbirds though.If there are firearms ordinances in your area you can purchase extremely powerful air rifles.The best are made in Europe or Japan.US air rifles blow but not much :). Of course having animal corpses in the yard can be a bit unsightly.
A tin plate tied to a limb so that it spins because of the wind I have heard works too.