I know. That happens from time to time. I really need to put something up to deter them.
Good luck..even with feeders away from the house..some birds are determined to hit the glass doors...I've only had cedar waxwings and one baby owl knock itself out..There are the occasional cardinal males who will constantly "fight" their image.
The baby owl I placed quickly in a shoe box lined with a wash rag, partially draped with a rag and it was gone by morning..
I have had good luck with this...minimal handling/contact.
I've wondered if you put a strip of masking tape on the window, if they would see it better. Like diagonal across the window??
Becky