Four particularly interesting gulls today at the farm.
BIRD ONE (pic one): A 'Caspian-type??'- this bird recalls Caspian gull but I would prefer to see a whiter head, more distinct shawl, paler underparts, more pronounced wing bars formed by white tips to greater coverts and secondaries, longer primary projection and more discrete marking to the mantle and scapulars.
BIRD TWO: This seems to look okay, especially structurally but didn't really see enough on it to scruntise.
BIRD THREE: A fair cop I reckon.