Shag (Phalacrocorax aristotelis) on mooring buoy. Hebrides, Scotland

Shag (Phalacrocorax aristotelis) on old pier. Shags use the old pier at Salen. Isle of Mull, throughout the year from which to forage in the Sound of Mull. Hebrides, Scotland

Shag (Phalacrocorax aristotelis) on old pier. Shags use the old pier at Salen. Isle of Mull, throughout the year from which to forage in the Sound of Mull. Hebrides, Scotland

Adult Antarctic Shag (Phalacrocorax (atriceps) bransfieldensis) feeding chicks on Petermann Island near the Antarctic Peninsula. This is the only blue-eyed shag species that does not move further north than the Antarctic Peninsula, even in winter.

Shag (Phalacrocorax aristotelis) portrait on old pier support. Taken at the top of Loch Etive in Glen Etive on an old pier. Shags feathers are not fully waterproof so they spend a lot of time preening and drying out of the water, Scotland

Swallow (Hirundo rustica) feeding young. Loch Awe, Argyll, Scotland, UK

Swallow (Hirundo rustica) juvenile begging for food. Loch Awe, Argyll, Scotland, UK

Rock shag (Phalacrocorax magellanicus) parent and chick in the Falkland Islands, Southern Atlantic Ocean.

Swallow (Hirundo rustica) juvenile begging for food. Loch Awe, Argyll, Scotland, UK

Swallow (Hirundo rustica) juvenile begging for food. Loch Awe, Argyll, Scotland, UK

Swallow (Hirundo rustica) juvenile begging for food. Loch Awe, Argyll, Scotland, UK

Swallow (Hirundo rustica) feeding young. Loch Awe, Argyll, Scotland, UK

Shag chicks. UK