I thought this was a GRSC in the field, but looking at the photo, it might be a LESC whose head feathers appear a little different because the duck had just come up from a dive.
Not sure about this track. Help appreciated!
This observation is for the central group of cormorants. The upper-left bird is a Pelagic Cormorant (note the white patches at its rear, not visible in all photos), but I am wondering about the others. I suspect they are also PECOs, but am not sure.