Well, at least here they do! This is what I saw at 1am today from my window: http://www.youtube.com/watch?v=xRt6Obq_fSQ Sorry about the poor light quality, but it was shot against a black sky and brightly-lit buildings, a lot of contrast for my poor wee camera!

http://myprops.org/channelcontent/Birds-get-beer-can-collars/ maybe this one I am not sure if this link will work but I thought it was sad and maybe somebody on here can help. >Kevin