Here is a link to a fairly clear photo of the cute little Harlequin Duck.
The markings that indicate it is a juvenile male are clearly visible (the
two white bars coming in [one on the scapular and one at the top of the
breast/base of neck], plus the vertical bars on the sides of the neck.
I will add a few more as time permits.
Hope everyone who wants to is able to get to see this lovely fellow.