Most think that they fly into windows because they see the reflection of the woods or whatever and head for a spot they see that is actually behind them. This guy crashed and burned in very low light conditions when there would have been little if any reflection. Who can really know? I know it's expensive if they blow out a large picture window as one did to my neighbor.

During the fall dispersal period, some young grouse crash into buildings, trees or through windows in a so-called "crazy-flight." Both of the birds that flew through my windows were young of the year birds.

Others that I heard about in the area were young of the year birds also. It wasn't an uncommon thing in my area. Fairly often I would hear of a grouse crashing through a window.

But your bird was a different story. I still think he was trying to get in for more seed. :)

Many birds fly into windows and other highly reflective structures at night during migration and it is not clear why. During the day, I always thought it was because of a reflection that led them to believe there was a way to go. They don't always die either. I've seen lots of birds crash into a window and were only stunned, and then recover and fly on their way.

A bitter sweet story that sounds like" The hero pig of Suffolk VA".