Here's a very interesting idea to help birds see glass windows yet not obstruct our view.
Quote:
Ottawa boy's invisible invention warns birds about deadly windowsFor his latest school science fair project he has invented invisible warning signals that can be placed — discreetly — right in the middle of a window pane. Read more:
http://www.cbc.ca/consumer/story/2009/01/21/ot-090121-bird-decals.html
Further research turned up that this product is already available--news to me.
http://windowalert.com/
However, I like the idea that you can just go buy the glow paint and make your own!