During breeding season, a mature great egret devopes the bright green area in front of its eye. This area is called the lores. Also the eye gets a red ring around it. The bill darkens. The rest of the year the lores are yellow, the bill is yellow and the eye is yellow without the ring of red. This egret is all decked out in its breeding colors and ready to find a mate. It was not yet paired up on this day.
Great Egret (Ardea alba)
UT Southwest Medical Center Rookery