Editing Isle of Lewis (section)

=== Land mammals ===
There are only two native land mammals in the Western Isles: [[red deer]] and [[Eurasian otter|otter]]. The [[European rabbit|rabbit]], [[mountain hare]], [[European hedgehog|hedgehog]], [[feral cat]], [[European polecat|polecat]] and both [[brown rat|brown]] and [[black rat]]s were introduced. The origin of mice and voles is uncertain.<ref name="cne-siar"/>

[[American mink]], another introduced species (escapees from [[fur farming|fur farms]]), cause problems for native ground-nesting birds, the local fishing industry and poultry farmers.<ref>{{Cite web |url=http://www.snh.org.uk/scottish/wisles/species.asp |title=SNH – Hebridean Mink Project |access-date=30 October 2007 |archive-url=https://web.archive.org/web/20071008092550/http://www.snh.org.uk/scottish/wisles/species.asp |archive-date=8 October 2007 }}</ref> Mink have been successfully eradicated<ref>{{Cite news|url=http://news.bbc.co.uk/2/hi/uk_news/scotland/highlands_and_islands/5306182.stm|title=New campaign waged against mink|date=1 September 2006|via=BBC News }}</ref> from the Uists and Barra. The second and ongoing phase of the Hebridean Mink Project aims to rid Lewis and Harris of mink in similar fashion.<ref>{{Cite web |url=http://www.snh.org.uk/scottish/wisles/intro.asp |title=Hebridean Mink Project |access-date=30 October 2007 |archive-url=https://web.archive.org/web/20071008092440/http://www.snh.org.uk/scottish/wisles/intro.asp |archive-date=8 October 2007 }}</ref>

There are claims that the Stornoway castle grounds are home to bats.<ref>{{cite web |url=http://www.echoesecology.co.uk/documents/AnIntroductionToTheBatsofScotlandEdition1Dec2006_002.pdf |title=An Introduction to the Bats of Scotland |access-date=6 February 2016 |archive-url=https://web.archive.org/web/20160303200951/http://www.echoesecology.co.uk/documents/AnIntroductionToTheBatsofScotlandEdition1Dec2006_002.pdf |archive-date=3 March 2016 }}</ref> In addition, some residents keep farm animals such as Hebridean sheep, Highland cattle or kyloe and a few pigs.