Rare wild pigeons extinct in most of the world have been discovered living in remote parts of Scotland and Ireland.

Researchers have found the Rock Dove - also known as the rock pigeon - living in islands off the coast of the British Isles.

An Oxford University team used DNA tests to find the creatures, which are the wild ancestors of common, feral pigeons seen in towns and cities.

Rock Doves, which nest in sea caves and mountains, are extinct in much of the world.