Siberian Weasel
Encyclopedia
The Siberian weasel also known as the Kolonok, is a medium-sized species of weasel
Weasel
Weasels are mammals forming the genus Mustela of the Mustelidae family. They are small, active predators, long and slender with short legs....

 native to Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

. It is classed as Least Concern
Least Concern
Least Concern is an IUCN category assigned to extant taxon or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, Near Threatened, or Conservation Dependent...

 for extinction
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...

 by the IUCN, due to its wide distribution and presumably large numbers.

In form and hunting behaviour, the Siberian weasel represents a transitional form between small mustelids (such as stoat
Stoat
The stoat , also known as the ermine or short-tailed weasel, is a species of Mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip...

s and least weasel
Least Weasel
The least weasel is the smallest member of the Mustelidae , native to Eurasia, North America and North Africa, though it has been introduced elsewhere. It is classed as Least Concern by the IUCN, due to its wide distribution and presumably large population...

s) and their larger cousins (mink
Mink
There are two living species referred to as "mink": the European Mink and the American Mink. The extinct Sea Mink is related to the American Mink, but was much larger. All three species are dark-colored, semi-aquatic, carnivorous mammals of the family Mustelidae, which also includes the weasels and...

s and polecats). It is a valuable furbearer, particularly for the paint brush industry.

Physical description

Siberian weasels have long, stretched out bodies with relatively short legs, but are more heavily built than solongoi
Mountain Weasel
The mountain weasel , also known as the pale weasel, Altai weasel or solongoi, is a species of weasel that prefer to live in environments that are usually high in altitude as well as rocky tundra and grassy woodlands covered in green vegetation.They rest in rock crevices, tree trunks, and...

s, stoat
Stoat
The stoat , also known as the ermine or short-tailed weasel, is a species of Mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip...

s and least weasel
Least Weasel
The least weasel is the smallest member of the Mustelidae , native to Eurasia, North America and North Africa, though it has been introduced elsewhere. It is classed as Least Concern by the IUCN, due to its wide distribution and presumably large population...

s. Their heads are elongated, narrow and relatively small, and their ears are broad at the base, but short. Their tails represent half their body length. Siberian weasels are much larger than stoats and solongois, and almost approach ferret
Ferret
The ferret is a domesticated mammal of the type Mustela putorius furo. Ferrets are sexually dimorphic predators with males being substantially larger than females. They typically have brown, black, white, or mixed fur...

s and minks in size. Adult males are 28–39 cm long, while females reach 25-30.5 cm. The tail in males reaches 15.5–21 cm in length, while that of females reaches 13.3-16.4 cm. Males weigh 650-820 g
Gram
The gram is a metric system unit of mass....

, while females weigh 360-430 g. Exceptionally large individuals have on rare occasions occurred in the Baraba steppe
Baraba steppe
The Baraba steppe, also known as Barabinsk steppe, , is a grassland steppe and wooded flat plain situated in western Siberia.The steppe has an area of 117,000 km² and stretches between the Irtysh and the Ob Rivers. Barabinsk is the largest city on the steppe. The Baraba steppe also contains...

. The skull is in several respects intermediate in form between that of the stoat and the mink
Mink
There are two living species referred to as "mink": the European Mink and the American Mink. The extinct Sea Mink is related to the American Mink, but was much larger. All three species are dark-colored, semi-aquatic, carnivorous mammals of the family Mustelidae, which also includes the weasels and...

 ; it is longer and larger than that of the stoat, but is somewhat more flattened than the mink's.

Their winter fur is very dense, soft and fluffy, with guard hairs reaching 3–4 cm in length. The underfur is dense and loose fitting. Siberian weasels are monotone in colour, being bright reddish-ocherous or straw-red, though orange or peach tones are sometimes noticeable on the skin. These tones are especially bright on the back, while the flanks and underbelly are paler. A dark, coffee-brown mask is present on the face. Their tails are more brightly coloured than the back, and are fluffier than those of other members of the genus. The lips and chin are white or slightly ochreous. The front of the muzzle is darker than the remaining parts of the head.

Reproduction

Siberian weasels have an extended rutting period which is subject to geographic variation. The rut begins in early Ferbruary through to late March in western Siberia. In Primorye, the rut begins in early March through to late April. Six pairs of Siberian weasels in a fur sovkhoz
Sovkhoz
A sovkhoz , typically translated as state farm, is a state-owned farm. The term originated in the Soviet Union, hence the name. The term is still in use in some post-Soviet states, e.g., Russia and Belarus. It is usually contrasted with kolkhoz, which is a collective-owned farm...

 near Moscow
Moscow
Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

 began rutting from 25 April to 15 May. They mate for 35 minutes, doing so repeatedly. The gestation period
Gestation period
For mammals the gestation period is the time in which a fetus develops, beginning with fertilization and ending at birth. The duration of this period varies between species.-Duration:...

 lasts 38–41 days. There is one record of a female giving birth after only 28 days. Litters consist of 4-10 kits.

Kits are born blind and sparsely furred with white wool. They develop light yellow wool after a few days, and open their eyes after a month. Lactation
Lactation
Lactation describes the secretion of milk from the mammary glands and the period of time that a mother lactates to feed her young. The process occurs in all female mammals, however it predates mammals. In humans the process of feeding milk is called breastfeeding or nursing...

 stops after two months, and the kits stop growing and become independent by late August. By this time, the young are distinguished from the adults solely by their darker coats, deciduous tooth formula and lighter bones.

Burrowing behaviours

Siberian weasels are not fussy about their shelters. They may nest inside fallen logs, empty stumps, brushwood piles and exposed tree roots. They also use and enlarge the dens of other animals. The length of their burrows range from 0.6-4.2 metres and are 0.2-1.3 metres deep. The nesting chamber, which is located in the middle or end of the passage, is lined with bird feathers and rodent wool. Beside a permanent burrow, adults have up to five temporary shelters which are separated from each other by several kilometres.

Diet

In terms of prey selection, Siberian weasels are midway between small, rodent-eating mustelids and the more polyphagous martens. They rarely eat reptile
Reptile
Reptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...

s, invertebrate
Invertebrate
An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group...

s and plant
Plant
Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...

s, preferring instead to prey on rodents of small to moderate size. Water voles
Arvicola
The water voles are large voles in the genus Arvicola. They are found in both aquatic and dry habitat through Europe and much of northern Asia...

 are their most frequent prey in their western range, while vole
Vole
A vole is a small rodent resembling a mouse but with a stouter body, a shorter hairy tail, a slightly rounder head, smaller ears and eyes, and differently formed molars . There are approximately 155 species of voles. They are sometimes known as meadow mice or field mice in North America...

s and mice
Mouse
A mouse is a small mammal belonging to the order of rodents. The best known mouse species is the common house mouse . It is also a popular pet. In some places, certain kinds of field mice are also common. This rodent is eaten by large birds such as hawks and eagles...

 are eaten in their eastern range. Moderate sized rodents targeted by Siberian weasels in the east include Daurian
Daurian Pika
The Daurian Pika is a species of mammal in the Ochotonidae family. It is found in China, Mongolia, and Russia....

 and Alpine pika
Alpine Pika
The Alpine Pika is a species of mammal in the Ochotonidae family. It is found in Kazakhstan, Mongolia, and Russia....

s, and Siberian zokor
Siberian Zokor
The Siberian Zokor is a species of rodent in the Spalacidae family. It is found in Kazakhstan and Russia.-References:* Tsytsulina, K. 2008. . Downloaded on 16 August 2009....

s. In local areas, chipmunk
Chipmunk
Chipmunks are small striped squirrels native to North America and Asia. They are usually classed either as a single genus with three subgenera, or as three genera.-Etymology and taxonomy:...

s, muskrat
Muskrat
The muskrat , the only species in genus Ondatra, is a medium-sized semi-aquatic rodent native to North America, and introduced in parts of Europe, Asia, and South America. The muskrat is found in wetlands and is a very successful animal over a wide range of climates and habitats...

s, red squirrel
Red Squirrel
The red squirrel or Eurasian red squirrel is a species of tree squirrel in the genus Sciurus common throughout Eurasia...

s and jerboa
Jerboa
The jerboa form the bulk of the membership of the family Dipodidae. Jerboas are hopping desert rodents found throughout Asia and Northern Africa. They tend to be found in hot deserts....

s are eaten. Fish
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

 may be eaten in some areas during certain seasons. In Ussuriland, they may scavenge extensively on the kills of wolves and yellow-throated martens during the winter. Elsewhere, small birds are an important food item. Reptiles and amphibian
Amphibian
Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods...

s are typically eaten at the periphery of the Siberian weasel's range. Plant foods known to be eaten by Siberian weasels include pine nut
Pine nut
Pine nuts are the edible seeds of pines . About 20 species of pine produce seeds large enough to be worth harvesting; in other pines the seeds are also edible, but are too small to be of great value as a human food....

s and actinidia
Actinidia
Actinidia is a genus of woody and, with few exceptions, dioecious plants native to temperate eastern Asia, occurring throughout most of China, Taiwan, Korea and Japan, and extending north to southeast Siberia and south into Indochina...

 fruits. They typically eat about 100-120 gm of food daily, and cache excess food. In urban areas in China, Siberian weasels prey extensively on rat
Rat
Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus...

s. They are capable of single-handedly killing and dragging the largest fowl
Fowl
Fowl is a word for birds in general but usually refers to birds belonging to one of two biological orders, namely the gamefowl or landfowl and the waterfowl...

s. In contrast to sable
Sable
The sable is a species of marten which inhabits forest environments, primarily in Russia from the Ural Mountains throughout Siberia, in northern Mongolia and China and on Hokkaidō in Japan. Its range in the wild originally extended through European Russia to Poland and Scandinavia...

s, which are ambush predators, Siberian weasels are active hunters, readily chasing prey through snow, logs, water and people's houses.

Subspecies

, eleven subspecies are recognised.

Range

The range of the Siberian weasels includes northern Myanmar
Myanmar
Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....

, Laos
Laos
Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...

, North Korea
North Korea
The Democratic People’s Republic of Korea , , is a country in East Asia, occupying the northern half of the Korean Peninsula. Its capital and largest city is Pyongyang. The Korean Demilitarized Zone serves as the buffer zone between North Korea and South Korea...

, Pakistan
Pakistan
Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

, Nepal
Nepal
Nepal , officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia. It is located in the Himalayas and bordered to the north by the People's Republic of China, and to the south, east, and west by the Republic of India...

, India
India
India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

, (Himalayas
Himalayas
The Himalaya Range or Himalaya Mountains Sanskrit: Devanagari: हिमालय, literally "abode of snow"), usually called the Himalayas or Himalaya for short, is a mountain range in Asia, separating the Indian subcontinent from the Tibetan Plateau...

), Bhutan
Bhutan
Bhutan , officially the Kingdom of Bhutan, is a landlocked state in South Asia, located at the eastern end of the Himalayas and bordered to the south, east and west by the Republic of India and to the north by the People's Republic of China...

, Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 (from the Kirov Province, Tataria, and the western Urals through Siberia
Siberia
Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

 and the Russian Far East
Russian Far East
Russian Far East is a term that refers to the Russian part of the Far East, i.e., extreme east parts of Russia, between Lake Baikal in Eastern Siberia and the Pacific Ocean...

), Taiwan
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

 and northern Thailand
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

. They have been introduced to Honshu
Honshu
is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

, Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

, Kamishima
Kamishima
is a small island in Mie Prefecture in Japan. The island is administered by and belongs to Toba city....

 and Jebu.

Relationships with humans

In Chinese folklore
Chinese folklore
Chinese folklore includes songs, dances, puppetry, and tales. It often tells stories of human nature, historical or legendary events, love, and the supernatural, or stories explaining natural phenomena and distinctive landmarks.-Folktales:...

, the Siberian weasel is viewed as a wandering spirit (shen) that can steal and replace people's souls.

Although Siberian weasels are overall useful for limiting rodent populations, they are nonetheless damaging to poultry
Poultry
Poultry are domesticated birds kept by humans for the purpose of producing eggs, meat, and/or feathers. These most typically are members of the superorder Galloanserae , especially the order Galliformes and the family Anatidae , commonly known as "waterfowl"...

 and muskrat
Muskrat
The muskrat , the only species in genus Ondatra, is a medium-sized semi-aquatic rodent native to North America, and introduced in parts of Europe, Asia, and South America. The muskrat is found in wetlands and is a very successful animal over a wide range of climates and habitats...

 farms. They frequently enter the roosts of domesticated fowl
Fowl
Fowl is a word for birds in general but usually refers to birds belonging to one of two biological orders, namely the gamefowl or landfowl and the waterfowl...

 and pigeons, sometimes killing more than they can eat
Surplus killing
Surplus killing is the behavior predators exhibit when they kill more prey than they can immediately use. They may partially consume, cache, or abandon intact prey...

.

Siberian weasels are valuable furbearers, being significantly harvested in Siberia and the Far East. Their fur is used both in its natural state and for imitating the fur of more valuable species. Siberian weasel fur makes the finest water color or oil paint brushes and is especially sought after by artists. The so-called kolinsky sable-hair brush is produced using the winter fur of the male Siberian weasel, not sable
Sable
The sable is a species of marten which inhabits forest environments, primarily in Russia from the Ural Mountains throughout Siberia, in northern Mongolia and China and on Hokkaidō in Japan. Its range in the wild originally extended through European Russia to Poland and Scandinavia...

. In China, their orange fur is largely used to create ink brush
Ink brush
Ink brushes are used in Chinese calligraphy. They are also used in Chinese painting and descendant brush painting styles. The ink brush was invented in China, believed to be around 300BCE...

 for East Asian calligraphers
East Asian calligraphy
East Asian calligraphy is a form of calligraphy widely practised and revered in the Sinosphere. This most often includes China, Japan, Korea, and Vietnam. The East Asian calligraphic tradition originated and developed from China. There is a general standardization of the various styles of...

. The name of the brush is thus 狼毫筆, lit. 'Wolf hairs brush', as a reduction from 黃鼠狼 + 毫 + 筆, lit. "yellow rat wolf" "hairs" "brush". Their hairs are appreciated because they are harder than goat hair (羊毫). They are hunted by shooting with dogs or through the use of box traps. They are extremely aggressive when caught in traps, emitting piercing shrieks and letting loose a pungent secretion which reportedly takes a month to wash away.
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