Hmmm. What have we here? This large white egret had us stumped for a bit, until a look at the books clearly showed that it was an adult white morph of the Reddish Egret (<i><a href="//commons.wikimedia.org/wiki/Egretta_rufescens" title="Egretta rufescens">Egretta rufescens</a></i>). Note the bicolored bill, reddish at the base and dark at the tip, along with shaggy neck plumes.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/9062441@N02">Len Blumin</a> from Mill Valley, California, United States
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/9062441@N02/2112211466/">Reddish Egret - White morph</a>