Male, Female, Gold, Silver

All along I've been watching these ducklings grow and exhibit different coloring, wondering which are female and which are male.  Aside from Whitey, who is getting much larger, lighter and whither, two have been more pale than the others, and I've wondered if they may be two females.  Most have a lot of dark grey on their backs, but these two are more bronze.  I finally figured out that these bronze ones must be the "Golden" Welsh Harlequins, and the rest would be the "Silver" Wel ...