I sent in a picture awhile ago, and you said it was a woodpecker, sapsucker variety. Now it seems there are flying insects, flies and small bees or wasps at the tree all the time, also have seen the woodpecker several times. Seems like they are ruining or killing the tree, what can we do to save it, or stop them from making it look like this? Organically if possible.
Usually, birds mine trees looking for bugs that currently reside in the tree. But sometimes, birds will create the cavities in the tree to attract bugs. The bugs sense the stress in the tree from the pecker pecking holes and the bugs come in to see what's happening... then the birds come back... and the tree is worse-for-wear. You can wrap the base of the tree in burlap (a sack) or some material that will impede the birds. Or spread some noxious material (something that stinks like game repellent that is used on reforestation trees).