We grow strawberries, and the birds get a lot more than
we do if we don't net the beds. This year Karen built a
raised strawberry bed about 3x10', and she now wants to
put bird netting over it. It has to be something you can
also take the netting off of so you can work on the bed,
pick berries, etc.

If none of the other suggestions work, consider switching
to "day neutral" strawberries. Most birds will leave the
berries alone once their young have left the nest...
--Glenn Lyford