I fiddled with your photo Melanie. I made it as large as I could & only sharpened for a better view. I did not mess with color or brightness or anything else.
I made some notes.
"wingtips show small dark gray tips on outer primaries (vs all white on Snowy Egret)" Look where I circled & then at the neon green arrows. Don't I see grey tips there?
See:
http://www.sibleyguides.com/20...