Weasels vary in length from 173 to 217 mm (6.8 to 8.5 in), females being smaller than the males, and usually have red or brown upper coats and white bellies; some populations of some species moult to a wholly white coat in winter. They have long, slender bodies, which enable them to follow their prey into burrows. Their tails may be from 34 to 52 mm (1.3 to 2.0 in) long. Weasels have a reputation for cleverness, quickness and guile.
Weasels feed on small mammals, and have from time to time been considered vermin, since some species took poultry from farms, or rabbits from commercial warrens. They occur all across the world except for Antarctica, Australia, and neighbouring islands. Some people train dogs to sniff out weasels. The benefit of this is to protect chickens and small mammals.
The English word "weasel" was originally applied to one species of the genus, the European form of the least weasel (Mustela nivalis). This usage is retained in British English, where the name is also extended to cover several other small species of the genus. However, in technical discourse and in American usage, the term "weasel" can refer to any member of the genus, or to the genus as a whole. Of the 17 extant species currently classified in the genus Mustela, ten have "weasel" in their common names. Among those that do not are the stoat, the polecats, the ferret, and the European mink (the superficially similar American mink is now regarded as belonging in another genus, Neovison).
The following information is according to the Integrated Taxonomic Information System.
|Mustela africana||Desmarest, 1800||Amazon weasel||South America|
|Mustela altaica||Pallas, 1811||Mountain weasel||Europe & Northern Asia
|Mustela erminea||Linnaeus, 1758||Stoat
|Europe & Northern Asia
Southern Asia (non-native)
New Zealand (non-native)
|Mustela eversmannii||Lesson, 1827||Steppe polecat||Europe & Northern Asia
|Mustela felipei||Izor and de la Torre, 1978||Colombian weasel||South America|
|Mustela frenata||Lichtenstein, 1831||Long-tailed weasel||Middle America
|Mustela itatsi||Temminck, 1844||Japanese weasel||Japan & Sakhalin Is. (Russia)|
|Mustela kathiah||Hodgson, 1835||Yellow-bellied weasel||Southern Asia|
|Mustela lutreola||(Linnaeus, 1761)||European mink||Europe & Northern Asia|
|Mustela lutreolina||Robinson and Thomas, 1917||Indonesian mountain weasel||Southern Asia|
|Mustela nigripes||(Audubon and Bachman, 1851)||Black-footed ferret||North America|
|Mustela nivalis||Linnaeus, 1766||Least weasel||Europe, Northern Asia
Southern Asia (non-native)
New Zealand (non-native)
|Mustela nudipes||Desmarest, 1822||Malayan weasel||Southern Asia|
|Mustela putorius||Linnaeus, 1758||European polecat
Domesticated ferret (ssp. furo)
|Europe, northern Asia
New Zealand (ssp. furo) (non-native)
|Mustela sibirica||Pallas, 1773||Siberian weasel||Europe, northern Asia
|Mustela strigidorsa||Gray, 1855||Back-striped weasel||Southern Asia|
|Mustela subpalmata||Hemprich and Ehrenberg, 1833||Egyptian weasel||Egypt|
1 Europe and northern Asia division excludes China.
Cultural meanings 
Weasels have been assigned a variety of different cultural meanings. In Greek culture, a weasel around the house is a sign of bad luck, even evil, "especially if there is in the household a girl about to be married", since the animal (based on its Greek etymology) was thought to be an unhappy bride who was transformed into a weasel and consequently delights in destroying wedding dresses. In neighboring Macedonia, however, weasels are generally seen as an omen of good fortune.
In early modern Mecklenburg, Germany, amulets from weasels were deemed to have strong magic; the period between August 15 and September 8 was specifically designated for the killing of weasels. In Montagne Noire (France), Ruthenia (Eastern Europe), and in the early medieval culture of the Wends, weasels were not meant to be killed.
Japanese folklore 
In Japan, weasels (鼬、鼬鼠 itachi ) were seen as yōkai from time immemorial, and they cause various strange occurances. According to the encyclopedia Wakan Sansai Zue from the Edo period, and a nate of weasels would cause conflagrations, and the cry of a weasel was considered a harbringer of misfortune. In the Niigata Prefecture, the sound of a nate of weasels making a rustle resembled 6 people hulling rice, and therefore was called the "the weasel's six-person mortar," and it was an omen for one's home to decline or flourish. It is said that when people chase after this sound, the sound stops.
They are also said to shapeshift like the fox (kitsune) or tanuki, and the nyūdō-bōzu told about in legends in the Tōhoku region and the Chūbu region are considered weasels in disguise, and they are also said to shapeshift into ōnyūdō and little monks.
In the collection of depictions, the Gazu Hyakki Yagyō by Sekien Toriyama, they were depicted under the title 鼬, but they were read not as "itachi" but rather as "ten," and "ten" were considered to be weasels that have reached one hundred years of age and became yōkai that possessed supernatural powers. Another theory is that when weasels reach several hundred years of age, they become mujina.
Kamaitachi are a phenomenon where when one is not doing anything, suddenly one would get injured as if one's skin was cut by a scythe.
In the past, they were thought to be "the deed of an invisible yōkai weasel," but nowadays, it has been established as a physiological phenomenon that dried skin that receives a shock would tear off. Nowadays, it has also been explained to be "caused by vacuum in the atmosphere," but this has not been established scientifically.
Also, there is the theory that "kamaitachi" are derived from "kamae tachi (構え太刀 "stance sword" )," and therefore were not originally related to weasels at all.
In popular culture 
- "The Weasel". The Mammal Society. Retrieved 18 January 2013.
- "Neovison macrodon (Sea Mink)". IUCN Red List of Threatened Species - Iucnredlist.org. Retrieved 2013-04-25.
- Lawson, John Cuthbert (2012). Modern Greek Folklore and Ancient Greek Religion: A Study in Survivals. Cambridge UP. pp. 327–28. ISBN 978-1-107-67703-6. Retrieved 13 February 2012.
- Abbott, George Frederick (1903). Macedonian folklore. Cambridge UP. pp. 108–109. Retrieved 13 February 2012.
- Brown, Frank C.; Hand, Wayland D. (1977). Frank C. Brown Collection of North Carolina Folklore: Popular Beliefs and Superstitions from North Carolina. Duke UP. p. 56. ISBN 978-0-8223-0259-9. Retrieved 13 February 2012.
- Hazlitt, William Carew; Brand, John (1905). Faiths and folklore: a dictionary of national beliefs, superstitions and popular customs, past and current, with their classical and foreign analogues, described and illustrated. Reeves and Turner. p. 622. Retrieved 13 February 2012.
- Thomas, N.W. (September 1900). "Animal Supterstitions and Totemism". Folk-lore 11: 228–67.
- 村上健司編著 『妖怪事典』 毎日新聞社、2000年、36頁。ISBN 978-4-6203-1428-0。
- 高田衛監修 稲田篤信・田中直日編 『鳥山石燕 画図百鬼夜行』 国書刊行会、1992年、50頁。ISBN 978-4-336-03386-4。
- 少年社・中村友紀夫・武田えり子編 『妖怪の本 異界の闇に蠢く百鬼夜行の伝説』 学習研究社〈New sight mook〉、1999年、123頁。ISBN 978-4-05-602048-9。
- 草野巧 『幻想動物事典』 新紀元社、1997年、30頁。ISBN 978-4-88317-283-2。
- "Mustela". Integrated Taxonomic Information System. Retrieved 24 July 2007.
- Nowak, Ronald M., and Ernest P. Walker. Walker's Carnivores of the World. Baltimore: Johns Hopkins University Press, 2005. ISBN 0-8018-8033-5, ISBN 0-8018-8032-7.
- C. Hart Merriam, Synopsis of the Weasels of North America, Washington, Government Printing Office, 1896.
|Look up weasel in Wiktionary, the free dictionary.|