Hi,
I witnessed the same thing at the weekend at work. We have large patio doors in our work and a baby blackbird flew into the glass and stunned itself. I though it's Mum would come looking for it as I did not see it happen but when I arrived at work on Sunday, it was dead and had been ripped apart. It broke my heart having to clean the mess up. We have an overhang above the patio doors but nothing seems to prevent them flying into the glass.
If you come up with a solution, I would be glad to hear from you.