Four and Twenty Blackbirds Perched in a Row

I thought I had got lots of choice with my blips today but my pictures of the full moon and the very heavy frost we suffered last night were over-exposed and far from sharp. I thought these birds perched on the electricity wires which serve the Barns Ness Lighthouse might do. They are, of course not blackbirds but possibly juvenile Black Terns but I stand to be corrected on this.