Birds like strawberries just as much as we do so some kind of protection is necessary for the fruits to survive. I made a wire mesh cage out of chicken wire with small hatches in the sides and on top. Then it’s possible to stick your hand in and grab some of the strawberries as they mature. I used a bunch of plastic ties to keep it all together and 6 sticks hammered into the ground. I’ve put some long grass cuttings between the soil and the fruits to keep the fruit clean and healthy.
It must be a depressing view for a bird :
It takes a while to build the cage but it’s definitely worth it: