Orkney vole
subspecies of mammal
The Orkney vole (Microtus arvalis orcadensis) is a population of the common vole found in the Orkney Islands, off the northern coast of Scotland. The common vole is absent from the rest of the British Isles.
Distribution and habitat
The Orkney vole occurs on nine islands of the group, Mainland: Sanday, Westray, Rousay, South Ronaldsay, Burray, Eday, Shapinsay, and Stronsay.
Taxonomy
In the past the populations on each of these islands have been named as subspecies, and the Orkney vole as a whole is considered by some taxonomists to be a subspecies of the common vole because of its size difference from the common vole. However, others do not recognise any subspecies of the common vole, especially since DNA analysis indicates transport by Neolithic humans from what is now Belgium. Chromosome studies have shown however, that despite being twice as heavy as continental voles, they are conspecific and should be regarded as a subspecies.
Origin
M. arvalis does not occur in mainland Britain, nor elsewhere in the British Isles. However, it does appear on the European continent. The current leading hypothesis for the development of this disjunct population is that voles were introduced to the Orkney archipelago by humans in Neolithic times, possibly concealed in animal fodder, from trade with the continent. The oldest known radiocarbon-dated fossil of the species in Orkney is 4,600 years old: this marks the latest possible date of introduction.
“Orkney vole” enters the record as subspecies of mammal. Crown Archives preserves that source wording while asking what Orkney, vole and subspecies can confirm, complicate or overturn.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jan 12, 2026. The linked authority identifier is Q10752709. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Orkney vole” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.