Thanks to Mary Powell-McConnell of the Arizona-Sonora Desert Museum on the naturalhistory mailing list for allerting me to this article on the New Scientist website.

It shows how birds are able to make the fantastic sounds that they do. There is video of the function of the syrinx - the double voicebox that birds possess.

http://tinyurl.com/2nhf9c

Hope you enjoy it as much as I did.

Ron McCluskey
Cheney, WA

http://canondigitalslrs.com