Added to the blog roll: David Sibley's blog. Here he writes about bird-proofing windows.
I live in a house with lots of windows, and I like to keep lots of bird feeders. This is good for me as a birder, but often bad for the birds. Over the years I have tried various methods of making the windows either more visible or less harmful, but sometimes it just doesn't help. Birds fly very fast and at times (for example, when startled by a predator) will try to fly through things they would normally avoid. Occasionally, Cooper's and Red-tailed hawks seem to learn that they can pop around the corner of the house, cause a panic at the bird feeder, and then have easy pickings from under the window.
My little legacy at the university will probably be the peregrine falcon silhouette sticker pasted on this glass windbreak that used to claim a bird every now and then. I like to think that fewer are being killed there now, and I hope that the Physical Plant people think that someone in authority approved the sticker.