Out of interest, one of the guests on that episode, Prof Tim Birkhead, wrote a book called Bird Sense (that is mentioned, briefly), which is one of the best books on biological science that I have read. Well worth a read.
Radio 4's Infinite Monkey Cage was about bird behaviour today- didn't catch all of it, but what I did hear was interesting. Here's the link should anyone want to listen to it:
http://www.bbc.co.uk/programmes/b09ly26f
