Window Cleaning after Bird Attacks!

Over the years I’ve seen a few bird hit windows with an image so cool you almost hate to clean it.
Always assumed it was dirt, but this BBC article says bird silhouettes are left by the bird’s “powder down” – a substance protecting growing feathers.
And here’s a photo gallery
Gary Mauer
Window Cleaning Network
Oconomowoc, Wisconsin


One Comment

  • I always wondered why birds left an imprint on glass when they fly into it. I just figured it was dirt / dust. Now I have an intelligent answer for my clients.

    Now, if I could only figure out an easy way to get beak-marks off of windows I’d be set. It makes me wonder what their little bird brains are thinking when they attack a window for hours on end!