By the way, I have a photo I've stuck online for just a little while (Don't go looking for it after next week, I'll clear it out). A friend in West Texas in the Davis Mountains sent it, with this message:
We were awakened with a bang this morning. A stupid dove flew head on, full military power, into our storm door window leaving this pattern on the glass. You will note that its beak and head are outlined with a lot of feathers. And yes it was DOA on the steps. The stupid birds do this frequently out here. I have had them fly into the side of the house, who knows. The first few times I found this pattern on my window I was not sure until a neighbor pointed one out to me on his window. I held up a pice of cardboard so the image would stand out.