nice moult, shame about the face
didn't waste any time getting stuck into the ylg's. on average they seemed to be slightly darker/dirtier/more streaked than birds i've seen in the west med (and which turn up in uk). there was a nice variation to keep up the interest (!), aren't gulls great...
super advanced 1st-winter?? completely moulted tail (2nd-winter type feathers) and all tertials
with a pale shade of grey on the mantle and pale centred coverts i'd call this an argenteus if i saw it back home. being as they're rare in portugal, maybe i shouldve looked at this more closely. or maybe not