When windows present a hazard, they can be too expensive to replace. Some kinds of screening and netting can solve the problem Netting should be a couple of inches at least from the glass, so that birds with long beaks can't hit the window before the netting stops them. It also needs to be reasonably taut, again to prevent birds from hitting the window despite the netting and also so that when a bird does collide with the netting, it works something like a trampoline.
Jan and John Green, respected conservationists and all-around wonderful people, live up the shore a ways. They installed netting on their house, and sent photos today.
Click on the photos to see them enlarged.