No-one's answered my question as to why the original subject bird shows a pale nail. Howard says it has a "blackish bill tip", which I just can't see. To me it has a more adult-like white tip to the bill with, just possibly, a small smidgeon of black. It certainly doesn't have the classic black nail shown here...
Every other feature is, as many have said, consistent with 1st winter albifrons
Whitefront and I don't want to deny that's what it is, just curious about this feature.