After a night of torrential thunderstorms, and a high spring tide, the Firth of Clyde was full of floating timber. And in the unearthly light of a flat calm dawn, nature was waking up. This arctic tern settled on a log just ahead of us, so we shut down the engine and just drifted towards it. There was only a moment to capture the image, and so I thanked my lucky stars that my camera was ready and with the right long lens fitted!