This is what I mean about the birds. I gave up after a while.
Dave
The "birds" appear in a couple of places on my image Dave and look quite similar to yours as you can see on the enlarged areas below.
I did see quite a few flocks of gulls over the sea but never as many as appear here - and I can't imagine any sane bird flying half way up a mountain in a February storm!
I'm beginning to wonder if it is wind blown ash or similar which gives the impression of being further away than it actually is.
Maybe one the Iceland regulars can shed some light on this - if you can pardon the pun