Subject: [Tweeters] re: Slaty-backed Gull Again
Date: Mar 11 12:41:09 2008
From: . KDB . - buhrdz at hotmail.com



...one more note: as I just walked in to sit in front of my computer, I noticed that my monitor portrays the gull as rather light mantled when viewed at an angle.
As I sit directly in front of it the gull appears decidedly darker backed, as it did in the field.
For anyone looking to judge shades of gray from online photographs, the optical illusion at:
http://web.mit.edu/persci/people/adelson/checkershadow_illusion.html
is a must see!!
Thanks again,
Keith Brady
Olympia, WA
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