Here's one more Inca Tern from the Lima harbor a few weeks ago. Shooting this species on a sunny day would have been next to impossible. On this particular morning, although the fog forced me to raise the ISO and lower the shutter speed beyond optimum settings, it made it possible to get some tonal gradation in the blacks. Cropped to vertical, added slivers of canvas to top, bottom and left sides. This probably doesn't qualify as high-key, since there is some tint to the sky.
D7200, 500f4, ISO 3200, 1/1250s @ f/6.3 manual, monopod.