You can get window adhesives to prevent birds from flying into them. I have one window that used to be really bad for it but since we put the bird collision prevention stickers on it we haven't had a single one smack into it.
Just remember to put the sticker on the outside as it's meant to break up the reflections on the window.
I'm not sure, I was looking for something inexpensive and quick to install at the time and the stickers fit the bill. There might be something out there, maybe someone else will have a better answer for you.