Three populations of Barnacle Goose occur in the UK, two of which are entirely migratory and come here for the winter months from their breeding grounds in either Svalbard or Greenland. Those birds found on the east coast of the UK and the Solway Firth are largely from the Svalbard population, while those from the Greenland population are chiefly found on the west coast of Scotland and in Ireland.
The third – and smallest – population is made up of naturalised birds, resident here throughout the year. Most of these are found in England, but also smaller numbers also occur in Wales and Scotland.
Read more about the study here.