There are two ways I know of to deter birds from eating your cherries, raspberries, strawberries, etc. The most effective is to use a net, but that doesn’t have the best aesthetics. If you have many fruit trees and want to get as much fruit as possible, go with the net.
However, there is a more natural way to go about it that doesn’t involve a large net. You can paint small, round rocks red.
The birds think it is ripe fruit and they pick at it. When they realize it’s hard, they figure the tree is bad and don’t go back. Our cherries went missing for weeks and then I put the rocks down around the base of the tree. Today I found a red cherry on the tree. Woohoo!