Orkney vole  (Microtus arvalis orcadensis)

Found on the islands of Rousay, Mainland, Sanday, Westray and South Ronaldsay in the Orkney Islands, Scotland. The subspecies was introduced to the islands 5,000 years ago, possibly on the boats of Neolithic settlers (4).

Inhabits old peat cuttings, grassy areas, drainage ditches, road verges and other linear habitats (4).