Gulls were spread out all over today, so were were happy to see at least 2 different Icelands, though not at the same time. This is the more coarsely marked bird, as dark as a very light Thayer's we had today. But, it still has the barred tertials and very light primaries with very indistinct dark arrowheads (barely visible here)

The two distinct bars across the tertials are twigs.