I wanted to post this clip from the BBC a few days ago but found the site to slow to navigate. But here it is now for anyone who missed it.
http://news.bbc.co.uk/local/threecounties/hi/people_and_places/nature/newsid_8490000/8490999.stm
“A bird doesn't sing because it has an answer, it sings because it has a song.”
Hi snaphappy, Thanks but I think it was Blackbird, who has already pointed this out to us last month. Mark Avery has also covered it on his blog.