Must admit I'd been assuming pics #1-6 were all the same individual, but they may not be - for clarification, the pics I mainly based my imm. Common Gull ID on are #4-5, but #1 looks like it too. Pic #2 could be a 1st-w Little Gull, though I'd also not rule out Kittiwake for that one.Doesn't the second image show a winter plumage Little Gull?
Yes, I meant Hydrocoloeus minutus. I'm sorry I used a shortcut. Too difficult this Latin name 😉 I have to use "copy and paste" function more often. I think it is one of these two species. Both are now regularly seen on the Baltic coast.I assumed Hydrocoloeus minutus