I've left this long enough, so here are the answers.
1. Hundreds of black-headed gulls are on the island. Most facing to the left. But look closely and you'll see a large, proud gull with its white primary (flight) feathers (unlike the black tipped primaries of the black headed gulls which surround it), a proper black head (not like the chocolate brown head of the poorly-named black-headed gulls), some very noticeable white eyeliner and a bright orange beak (instead of the port-coloured beaks of the black headed gulls). This proud-looking gull is a Mediterranean gull.
2. The three birds you can see in the photo are a) the obvious black headed gull feeding at the water's edge. b) A pied wagtail in between the two posts at the top left of the image and..... c) A little ringed plover too (see the pink arrow below).
Yes. You'll need better than eyes than that, if you want a shot at my title, you know!