>And in this book, Pinker describes how corvids, sturnids (let's not forget
>the mynah birds!), and psittacids "speak". It has absolutely nothing to do
>with any similarity between bird and human vocal apparatus--in fact, the
>sounds they make are not even acoustically very like speech.
>It has something to do with the birds' ability to create sound waves at
>multiple frequencies simultaneously that, when the peaks and troughs line
up
>correctly, sound--to human ears--like speech.
>-Nick P.
>Olympia, WA

I can't find my tape of bird songs/ID - so I can't tell you who gave me this
information, but the tape, which then sounded out the birdsong slowed down
to individual waves like the old windup Victrola winding down showed what
humans hear is totally different from what birds are singing .....

Toni
Seattle