Last weekend we heard a large thud at the front window, got up to see this. Seems a bird, maybe a dove was trying to avoid a hawk and did not realize my dirty window was a window. We went outside to check on the bird but it was no where in site.
It left a perfect dust and bird grease imprint of itself on the window. Pretty amazing to see.
I was surprised to see each feather of the wing. I hope the bird is OK.