The Siberian chipmunk (''Eutamias sibiricus''), also called common chipmunk is native to northern
Asia
Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...
from central
Russia
Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
to
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
Korea
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...
, and
Hokkaidō
is Japan's second largest island and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel.
The la ...
in northern
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
.
[ It was imported from ]South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
and introduced in Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
as a pet in the 1960s.
Description
Typically the Siberian chipmunk has four white stripes and five dark stripes along the back. It is long, a third of which is the tail. The weight of adults depends on the time of year and food availability. It exhibits slight variations in coloration in different geographic regions. Even though the Siberian chipmunk normally grows to . The Siberian chipmunk exhibits sexual dimorphism
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most ani ...
, and size and body proportions are the only way to distinguish younger chipmunks from older ones. Its small size may contribute to its relatively short life from two to five years in the wild. However, in captivity
Captivity, or being held captive, is a state wherein humans or other animals are confined to a particular space and prevented from leaving or moving freely. An example in humans is imprisonment. Prisoners of war are usually held in captivity by a ...
it lives up to ten years.
Distribution
This species is native to Russia
Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
in northern European, Siberia
Siberia ( ; rus, Сибирь, r=Sibir', p=sʲɪˈbʲirʲ, a=Ru-Сибирь.ogg) is an extensive geographical region, constituting all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has been a part of ...
to Sakhalin
Sakhalin ( rus, Сахали́н, r=Sakhalín, p=səxɐˈlʲin; ja, 樺太 ''Karafuto''; zh, c=, p=Kùyèdǎo, s=库页岛, t=庫頁島; Manchu: ᠰᠠᡥᠠᠯᡳᠶᠠᠨ, ''Sahaliyan''; Orok: Бугата на̄, ''Bugata nā''; Nivkh: ...
and Kunashir
, other_names = kz, Kün Ashyr; ja, 国後島
, location = Sea of Okhotsk
, locator_map = File:Kurily Kunashir.svg
, coordinates =
, archipelago = Kuril Islands
, total_islands =
, major_islands =
, area =
, length =
, width = fr ...
, extreme eastern Kazakhstan
Kazakhstan, officially the Republic of Kazakhstan, is a transcontinental country located mainly in Central Asia and partly in Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbeki ...
, northern Mongolia
Mongolia; Mongolian script: , , ; lit. "Mongol Nation" or "State of Mongolia" () is a landlocked country in East Asia, bordered by Russia to the north and China to the south. It covers an area of , with a population of just 3.3 million, ...
, northern and central China, Korea, and in Japan in Hokkaido
is Japan's second largest island and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel.
The la ...
, Iturup
, other_names = russian: Итуру́п; ja, 択捉島
, location = Sea of Okhotsk
, coordinates =
, archipelago = Kuril Islands
, total_islands =
, major_islands =
, area_km2 = 3139
, length_km = 200
, width_km = 27
, coastline =
, highest_moun ...
, Rishiri, Rebun, Teuri
Teuri Island (天売島 Teuri-tō) is an island in the Sea of Japan 30 km west of Haboro port in Haboro, Tomamae District, in the Rumoi Subprefecture in Hokkaido. The Island, along with neighboring Yagishiri island on its east side, belongs ...
, and Yagishiri. It has been introduced at one confirmed locality, Karuizawa
is a resort town located in Nagano Prefecture, Japan. , the town had an estimated population of 20,323 in 9897 households, and a population density of 130 persons per km². The total area of the town is . Karuizawa is one of the oldest and most ...
, on Honshu
, historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island separ ...
.[
During the 1960s, South Korea began to export these animals to Europe as pets.] Between 1960 and 1980, South Korea exported more than 200,000 individuals to Europe.
In the 1970s there were sightings in parks in Europe, and a number of small populations have become resident in suburban forests and urban parks in Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to th ...
, France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
, Switzerland
). Swiss law does not designate a ''capital'' as such, but the federal parliament and government are installed in Bern, while other federal institutions, such as the federal courts, are in other cities (Bellinzona, Lausanne, Luzern, Neuchâtel ...
, Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
, Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
, the Netherlands
)
, anthem = ( en, "William of Nassau")
, image_map =
, map_caption =
, subdivision_type = Sovereign state
, subdivision_name = Kingdom of the Netherlands
, established_title = Before independence
, established_date = Spanish Netherl ...
, and Austria
Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...
. This is mostly caused by owners releasing these animals because they no longer wanted them as pets, or the owners purposefully freed the chipmunks to live naturally in the wild. Other Siberian chipmunks escaped from captivity
Captivity, or being held captive, is a state wherein humans or other animals are confined to a particular space and prevented from leaving or moving freely. An example in humans is imprisonment. Prisoners of war are usually held in captivity by a ...
and inhabited the forested areas of Europe. The Dutch chipmunks for example are escapees from a former zoo in Tilburg
Tilburg () is a city and municipality in the Netherlands, in the southern province of North Brabant. With a population of 222,601 (1 July 2021), it is the second-largest city or municipality in North Brabant after Eindhoven and the seventh-larg ...
. When the zoo was shut down and all animals were moved away, many chipmunks got forgotten due to their underground residence. While thousands of animals were introduced to new environments, they are not very invasive and are naturally slow spreading, per year, which prevented them from rapidly moving to areas far beyond where they escaped. In 2009, 22 introduced populations in Europe, and 11 in France, were identified in forests and urban parks since the 1970s (not all may still be extant).
Invasiveness
In Europe, the Siberian chipmunk is included since 2016 in the list of Invasive Alien Species of Union concern
In 2016, following the EU Regulation 1143/2014 on Invasive Alien Species (IAS), the European Commission published a first list of 37 IAS of Union concern. The list was first updated in 2017 and comprised 49 species. Since the second update in 201 ...
(the Union list). This implies that this species cannot be imported, bred, transported, commercialized, or intentionally released into the environment in the whole of the European Union.
Habitat
The Siberian chipmunk can survive in a variety of habitats
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
and conditions. They are usually found in coniferous forests
Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single extant class, Pinopsida. All exta ...
, stony areas within forests
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...
and mountains
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher th ...
, habitats filled with shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...
, along waterways or roads, or other small patches of agricultural land. In Europe, the introduced populations usually live in deciduous forests
In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, ...
, mixed deciduous and coniferous forests, or urban areas with greenery. ''Tamias sibiricus'' is able to survive in various environmental conditions, anywhere from 29°N to 69°N and −65 °C to 30 °C. However, this species has a low ability of dispersal, and since they are mainly introduced into woody forests or urban areas with greenery, they have less potential to be naturally dispersed to other regions. Also they have trouble overcoming man-made and naturally occurring obstacles, like roads or swamps
A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Swamps are considered to be transition zones because both land and water play a role in ...
.
The Siberian chipmunk lives in loose colonies, where every individual has its own territory
A territory is an area of land, sea, or space, particularly belonging or connected to a country, person, or animal.
In international politics, a territory is usually either the total area from which a state may extract power resources or a ...
. The territory ranges from 700 to 4000 m2 and is larger for females than males and is also larger in autumn
Autumn, also known as fall in American English and Canadian English, is one of the four temperate seasons on Earth. Outside the tropics, autumn marks the transition from summer to winter, in September ( Northern Hemisphere) or March ( Sou ...
than spring
Spring(s) may refer to:
Common uses
* Spring (season)
Spring, also known as springtime, is one of the four temperate seasons, succeeding winter and preceding summer. There are various technical definitions of spring, but local usage of ...
. The Siberian chipmunk marks its territory with urine and oral glands inside of its cheeks. This method illustrates one way in which this species communicates with one another.
Behaviour
Siberian chipmunks usually live solitary lives, but during the winter they create a burrow
An Eastern chipmunk at the entrance of its burrow
A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of sh ...
, which they often share with another chipmunk. Its burrow, which can be long and deep, consists of a nest chamber, several storage chambers and chambers for the waste. During this winter season, these chipmunks store of food in order to survive underground until April or May. In addition to pairing off during hibernation, they also use a complex voice communication system to interact. They have two vocal sounds, a fast, sharp sound for when they are frightened and a deep croak sound that is thought to be used for mating.
Chipmunks with more active and curious behaviour, based on trappability of marked individuals, have a greater number of ticks.
Reproduction
It is known that they are iteroparous
Semelparity and iteroparity are two contrasting reproductive strategies available to living organisms. A species is considered semelparous if it is characterized by a single reproductive episode before death, and iteroparous if it is characteri ...
, viviparous
Among animals, viviparity is development of the embryo inside the body of the parent. This is opposed to oviparity which is a reproductive mode in which females lay developing eggs that complete their development and hatch externally from the m ...
, and their breeding season usually occurs after hibernation in mid April. They tend to breed only once or twice a year, and the number of offspring varies from three to eight. The young are born blind and naked, and they weigh between . After the 28- to 35-day gestation period
In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once it ...
, the offspring open their eyes about 20 to 25 days after birth. The females are responsible for caring for the young, and they teach them how to forage
Forage is a plant material (mainly plant leaves and stems) eaten by grazing livestock. Historically, the term ''forage'' has meant only plants eaten by the animals directly as pasture, crop residue, or immature cereal crops, but it is also used m ...
around six weeks. Then the offspring complete the weaning
Weaning is the process of gradually introducing an infant human or another mammal to what will be its adult diet while withdrawing the supply of its mother's milk.
The process takes place only in mammals, as only mammals produce milk. The infan ...
stage around seven weeks, and they reach the independent stage around eight weeks. Adult body mass is reached at around three to four months, and by nine months, both the male and the female reach sexual maturity.
Diet
Siberian chipmunks are omnivores
An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutri ...
that store or cache food. Normally, they eat pine seeds, along with different deciduous and coniferous tree seeds. In addition to seeds, they eat herb roots, insect
Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...
s, mollusc
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...
s, birds, reptiles, grains, fruit, and fungus
A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...
.
Ecology
Siberian chipmunks are essential food sources for other animals, such as diurnal raptors, weasel
Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets and European mink. Members of this genus are small, active predators, with long and slender bo ...
s, and small cat
The cat (''Felis catus'') is a domestic species of small carnivorous mammal. It is the only domesticated species in the family Felidae and is commonly referred to as the domestic cat or house cat to distinguish it from the wild members of ...
s. Other known predators include hawk
Hawks are bird of prey, birds of prey of the family Accipitridae. They are widely distributed and are found on all continents except Antarctica.
* The subfamily Accipitrinae includes goshawks, sparrowhawks, sharp-shinned hawks and others. Th ...
s, owl
Owls are birds from the order Strigiformes (), which includes over 200 species of mostly solitary and nocturnal birds of prey typified by an upright stance, a large, broad head, binocular vision, binaural hearing, sharp talons, and feathers a ...
s, and fox
Foxes are small to medium-sized, omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull, upright, triangular ears, a pointed, slightly upturned snout, and a long bushy tail (or ''brush'').
Twelve sp ...
es. They evade being preyed upon by these animals by being alert, hiding in their burrows, and using their camouflaged fur to blend in with surroundings. They distribute seeds and fungal spore
In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, f ...
s, and other animals feed off their stored food. They may help control forest tree pests. In Russia, they eat approximately 50 percent of the forest nuts. In Belgium, these chipmunks have been blamed for preying upon low-nesting birds.[
If the species were introduced to Britain, it is possible that Siberian chipmunks may compete with other small animals, such as the ]red squirrel
The red squirrel (''Sciurus vulgaris'') is a species of tree squirrel in the genus ''Sciurus'' common throughout Europe and Asia. The red squirrel is an arboreal, primarily herbivorous rodent.
In Great Britain, Ireland, and in Italy numbers ...
, wood mouse
The wood mouse (''Apodemus sylvaticus'') is a murid rodent native to Europe and northwestern Africa. It is closely related to the yellow-necked mouse (''Apodemus flavicollis'') but differs in that it has no band of yellow fur around the neck, ha ...
, and bank vole
The bank vole (''Myodes glareolus'') is a small vole with red-brown fur and some grey patches, with a tail about half as long as its body. A rodent, it lives in woodland areas and is around in length. The bank vole is found in much of Europe an ...
.[
]
Relationship to humans
Some people keep Siberian chipmunks as pets or sell them for their fur or other body parts. Siberian chipmunks may eat crops and damage gardens. In Russia they can cause serious economic damage to grain fields and orchards.
The species can carry Lyme disease
Lyme disease, also known as Lyme borreliosis, is a vector-borne disease caused by the ''Borrelia'' bacterium, which is spread by ticks in the genus ''Ixodes''. The most common sign of infection is an expanding red rash, known as erythema migran ...
, caused by the bacteria ''Borrelia burgdorferi
''Borrelia burgdorferi'' is a bacterial species of the spirochete class in the genus ''Borrelia'', and is one of the causative agents of Lyme disease in humans. Along with a few similar genospecies, some of which also cause Lyme disease, it make ...
'', that can be transmitted through ticks. In a study in a park near Paris where the Siberian chipmunk had established itself, in comparison to bank voles and wood mice
The wood mouse (''Apodemus sylvaticus'') is a murid rodent native to Europe and northwestern Africa. It is closely related to the yellow-necked mouse (''Apodemus flavicollis'') but differs in that it has no band of yellow fur around the neck, h ...
, the Siberian chipmunks had a much higher infection load than their native counterparts. Because they were more diseased, it was theorised that they contributed to more infected questing nymph ticks, thus potentially exposing humans to greater risk.
References
External links
Boreal Forest Mammals: Siberian Chipmunk
*
'
*
'
{{Taxonbar, from=Q329187
Chipmunks
Mammals of Asia
Fauna of Siberia
Mammals of Russia
Rodents of China
Mammals of Japan
Mammals described in 1769