Classic scarecrows are a thing of the past. Going with the times, we can treat unwanted bird stalkers the crops of a modern "fear".
Hang a few unnecessary CDs between the branches of fruit trees. The sun's rays reflecting on their surface, by creating a colorful game of flashes, they effectively scare off eaters.
The shiny red ribbon will further enhance the effect. You can also tie it alone to long sticks stuck in the flower beds (so, let its ends fly).