Here's a good article on a big problem for birds...
"No one knows what birds see when they look out at the world, says ornithologist Daniel Klem, but he's sure they don't see glass. He estimates that at least 1 billion birds are killed by flying into windows every year in the United States."
Link: Full Article from NPR News
Black-capped Chickadee image © 2006 Mike McDowell
