My young Pin Oak tree is covered in galls. We lost the leader last year and were able to establish another leader. We moved a bird feeder close to the tree because we heard that birds, especially woodpeckers like to eat these galls for food. It worked at first but we haven't seen a woodpecker after early spring and now we're worse off than ever. I'm afraid that we're going to lose the tree altogether! Aside from cutting down the tree and burning it, which I did for the leader, what can be done about this? We sprayed a little to kill wasps yesterday but they're back again and we don't want to harm the birds that eat the galls.