Jim
Maybe part of the change in the sound of song to us is we don't hear as well 
as we use to.  Interesting article.
Regards
George

----- Original Message ----- 
From: "Jim and Ann Nelson" <>
To: <>
Sent: Tuesday, July 10, 2007 5:55 PM
Subject: [MDOSPREY] Songbirds Prefer the Latest Tunes


If you think bird songs sound different than when you first heard them years 
ago, there may be something to it.
http://www.livescience.com:80/animals/070710_latest_song.html

Jim Nelson
Bethesda, MD