I live in a house that is 90 % glass. Woke up 1 morning to a very loud bang - and looked outside - I saw a hawk looking at me with a dazed stare. He then shook it off and tried to take off - he missed the other windows of my house by not more then 6 inches.
Lesson: Birds are dumb - in this case he tried for a mouse and forgot to pull up - or pulled up right into a 10 foot pane of glass.
Wolfala