My Office Window...

I work in a big glass industrial building in the middle of a big industrial office park near the MO river. For all the 'Industry' all around, there's also plenty of wildlife, including ducks, geese and even the occational blue heron chilling in the drainage ditch we call 'The River Universal'

Anyway, the past few days, this little bird, (probably a robin?) keeps attacking my office window. I'm sure he sees his reflection and he must have some real self esteem issues because he sure hates himself. At first it was kinda funny, but I'm starting to feel bad about it. I haven't seen him this AM, but the outside of the window looks like a murder scene, with all kinds of scratches and slime.

What should I do? Do I let him continue to beat his little brain in? Do I clean off the crime scene from the window? Do I try to somehow coat the window with something to make it foggy and not reflective?