In the fall of 2010 a Great Egret (actually probably two) took up residence at Nisqually Wildlife Refuge. I spent an hour taking about 170 shots of this Egret in October. On January 16, 2011, Dave Richardson posted on Tweeters
http://mailman2.u.washington.edu/pipermail/tweeters/2011-January/081524.htmlthat Marian Bailey, Wildlife Biologist at Nisqually NWR had noticed that one of the Egrets had yellow legs, while all guidebooks show American Great Egrets with black legs. As these pictures show, this bird has yellow legs. There has been considerable discussion on various boards as to exactly which egret this is.
