I could see the pink wash on the white plumage of this bird when I was photographing it, but it was so faint that in some light it doesn't show up, as some of these pictures illustrate. In breeding plumage, the pink is much more vivid, and is set off by an elegant black collar. Here, with permission, are photos of these birds in this most spectacular plumage, taken by
Doug Gochfeld: http://www.flickr.com/photos/29840397@N08/8810961080
and
Bruce Mactavish: http://brucemactavish1.blogspot.com/2014_04_01_archive.html