As my sandbar is invariably clogged up with fishermen these days, I'm going to have to dig into photos from previous years to keep this thread 'alive' in any way. Attached are a couple of vegae from late Feb 2016.
The first-winter shows contrasting pale greater coverts, a decidedly inconspicuous 'window' in its 'hand' (like taimyrensis), but no sign of feather replacement in its mantle or lesser coverts (unlike taimyrensis). With such a dark body and tail, I initially thought I might have an American Herring Gull in this individual, but the pale greater coverts effectively rule that out.
The adult shows head markings too extreme for taimyrensis, and the pale mantle and pink legs also rule that 'form' (whatever the **** it is) out. I have over time come to associate dark eyes with vegae, though this association might not be valid.