With a wing span exceeding 2 metres, white-tailed sea eagles are Britain's largest bird of prey. Once extinct in the British Isles, they have been reintroduced to the Western Isles of Scotland. I made this photograph from a boat off the west coast of Mull. The eagle swooped to seize a fish thrown into the water, enabling me to track it using predictive autofocus and a shutter speed of 1/1,600th second. Overcast lighting, a common feature on Mull, required a high ISO but suits the subject as it avoids excessive contrast and a difficult to expose shadow on the underside of the bird's wing.