Haven’t tried this but it sounds reasonable and could very well work.
Paint stones to look like strawberries. Place them in your strawberry patch long before plants begin setting fruit.
Local birds will be attracted to your fake strawberries and discover they are inedible rocks. When the real fruit comes on they’ve already learned there’s nothing but rock here and leave the real ones alone!
Thanks to Lee Wismer for the tips on painting rocks to look like strawberries.