subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ...
of
squirrel
Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels (including chipmunks and prairie dogs, among others), and flying squirrels. Squ ...
s (in the
family
Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...
Sciuridae
Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels (including chipmunks and prairie dogs, among others), and flying squirrels. Squ ...
), uniting the
flying squirrel
Flying squirrels (scientifically known as Pteromyini or Petauristini) are a tribe of 50 species of squirrels in the family Sciuridae. Despite their name, they are not in fact capable of full flight in the same way as birds or bats, but they ar ...
s with certain related tree squirrels. Older sources place the flying squirrels in a separate subfamily (Pteromyinae) and unite all remaining sciurids into the subfamily Sciurinae, but this has been strongly refuted by
genetic studies
Genetic analysis is the overall process of studying and researching in fields of science that involve genetics and molecular biology. There are a number of applications that are developed from this research, and these are also considered parts of ...
.
Classification
Subfamily SciurinaeThorington, R. W. and R. S. Hoffmann. 2005. Family Sciuridae. pp 754–818 in Mammal Species of the World A Taxonomic and Geographic Reference. Johns Hopkins University Press, Baltimore.
walker's mammals of the world 5th edition Volume 1
*Tribe
Sciurini
Sciurini is a tribe (taxonomy), tribe that includes about forty species of squirrels,Thorington and Hoffmann, 2005, p. 754 mostly from the Americas. It includes five living genera—the American dwarf squirrels, ''Microsciurus''; the Bornean ...
**Genus ''
Microsciurus
''Microsciurus'' or dwarf squirrels is a genus of squirrels from the tropical regions of Central and South America.
Taxonomy and systematics
Recent DNA analysis has shown that there is some confusion regarding the traditional classification o ...
'' – American dwarf squirrels
***
Central American dwarf squirrel
The Central American dwarf squirrel, also known as Alfaro's pygmy squirrel,(''Microsciurus alfari'') is a small tree squirrel in the genus ''Microsciurus'' and Tribe (biology), tribe Sciurini found in Colombia, Costa Rica, Nicaragua, and Panama. ...
, ''M. alfari''
***
Amazon dwarf squirrel
The Amazon dwarf squirrel (''Microsciurus flaviventer'') is a chipmunk-sized tree squirrel native to South America.
Description
As its name suggests, the Amazon dwarf squirrel is relatively small, with a head-body length of and a tail long. Ad ...
, ''M. flaviventer''
***
Western dwarf squirrel
The western dwarf squirrel (''Microsciurus mimulus'') is a small tree squirrel in the genus ''Microsciurus'' and tribe ''Sciurini'' found in Colombia, Ecuador, and Panama
Panama ( , ; es, link=no, Panamá ), officially the Republic of ...
, ''M. mimulus''
***
Santander dwarf squirrel
The Santander dwarf squirrel (''Microsciurus santanderensis'') is a small tree squirrel endemic to Colombia.
Description
The Santander dwarf squirrel is a small tree squirrel, measuring around from nose to rump, with a tail about the same lengt ...
Sciurus
The genus ''Sciurus'' contains most of the common, bushy-tailed squirrels in North America, Europe, temperate Asia, Central America and South America.
Species
The number of species in the genus is subject to change.
In 2005, Thorington & Hoffma ...
''
***Subgenus ''Sciurus''
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Allen's squirrel
Allen's squirrel (''Sciurus alleni'') is a tree squirrel in the genus ''Sciurus'' endemic to northern Mexico. It has no recognised subspecies.
References
Endemic mammals of Mexico
Sciurus
Mammals described in 1898
Taxonomy articles crea ...
, ''S. alleni''
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Arizona gray squirrel
The Arizona gray squirrel (''Sciurus arizonensis'') is a tree squirrel, in the genus ''Sciurus'', endemic to the canyons and valleys surrounded by deciduous and mixed forests in eastern Arizona and northern Mexico.
It is threatened by habitat l ...
, ''S. arizonensis''
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Mexican gray squirrel
The Mexican gray squirrel (or red-bellied squirrel) (''Sciurus aureogaster'') is a tree squirrel in the genus ''Sciurus'' native to Guatemala and eastern and southern Mexico. It has been introduced to the Florida Keys.
The alternate name should ...
, ''S. aureogaster''
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Eastern gray squirrel
The eastern gray squirrel (''Sciurus carolinensis''), also known, particularly outside of North America, as simply the grey squirrel, is a tree squirrel in the genus ''Sciurus''. It is native to eastern North America, where it is the most prodi ...
, ''S. carolinensis''
****
Collie's squirrel
Collie's squirrel (''Sciurus colliaei'') is a tree squirrel in the genus ''Sciurus'' endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined ...
, ''S. colliaei''
****
Deppe's squirrel
Deppe's squirrel (''Sciurus deppei'') is a species of tree squirrel in the genus ''Sciurus'' native to Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua.
Description
''Sciurus deppei'' varies in individual color. Th ...
, ''S. deppei''
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Japanese squirrel
The Japanese squirrel (''Sciurus lis'') is a tree squirrel in the genus ''Sciurus'' endemic to Japan. It was described by Dutch zoologist Coenraad Jacob Temminck in 1844. The Japanese squirrel's range includes the islands of Honshū, Shikoku, and ...
, ''S. lis''
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Calabrian black squirrel
The Calabrian black squirrel (''Sciurus meridionalis'') is a species of tree squirrel in the genus ''Sciurus'', endemic to the forests of the regions of Calabria and Basilicata, in the south of the Italian Peninsula.
Taxonomy
It has long been ...
, ''S. meridionalis''
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Mexican fox squirrel
The Mexican fox squirrel (''Sciurus nayaritensis'') is a species of tree squirrel found throughout the Sierra Madre Occidental of Mexico as far south as Jalisco — and northward into the Chiricahua Mountains of southeastern Arizona, U.S.Best, T ...
, ''S. nayaritensis''
****
Fox squirrel
The fox squirrel (''Sciurus niger''), also known as the eastern fox squirrel or Bryant's fox squirrel, is the largest species of tree squirrel native to North America. Despite the differences in size and coloration, it is sometimes mistaken for ...
Variegated squirrel
The variegated squirrel (''Sciurus variegatoides'') is a tree squirrel in the genus ''Sciurus'' found in Costa Rica, El Salvador, Guatemala, Honduras, southern Mexico, Nicaragua, and Panama. Fifteen subspecies are recognised. It is a common s ...
, ''S. variegatoides''
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Eurasian 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 ...
, ''S. vulgaris''
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Yucatan squirrel
The Yucatan squirrel (, ''Sciurus yucatanensis''), originally named the Yucatan gray squirrel, also once named the Campeche squirrel, is a tree squirrel in the genus ''Sciurus'' found in the Yucatán Peninsula and adjacent areas. It is native to ...
Abert's squirrel
Abert's squirrel or the tassel-eared squirrel (''Sciurus aberti'') is a tree squirrel in the genus ''Sciurus'' native to the southern Rocky Mountains from the United States to the northern Sierra Madre Occidental of Mexico, with concentrations fo ...
Yellow-throated squirrel
The yellow-throated squirrel (''Sciurus gilvigularis'') is a tree squirrel in the genus ''Sciurus'' endemic to South America. It is found in Brazil, Guyana and Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( e ...
, ''S. gilvigularis''
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Red-tailed squirrel
The red-tailed squirrel (''Sciurus granatensis'') is a species of tree squirrel distributed from southern Central America to northern South America.
Distribution
It is found in Central and South America ( Colombia, Costa Rica, Ecuador, Panama, ...
Andean squirrel
The Andean squirrel (''Sciurus pucheranii'') is a tree squirrel endemic to Colombia where it inhabits montane rain forest and cloud forests of the Cordillera Occidental and Cordillera Central ranges of the Colombian Andes, at elevations betwe ...
, ''S. pucheranii''
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Richmond's squirrel
Richmond's squirrel (''Sciurus richmondi'') is a poorly known tree squirrel in the genus ''Sciurus'' endemic to Nicaragua, which is likely a synonym of the red-tailed squirrel (''Sciurus granatensis''). It is locally known as the ardilla del rama ...
Tenes
In Greek mythology, Tenes or Tennes (Ancient Greek: Τέννης) was the eponymous hero of the island of Tenedos.
Family
Tenes was the son either of Apollo or of King Cycnus of Colonae by Proclia, daughter or granddaughter of Laomedon.
...
''
****
Persian squirrel
The Caucasian squirrel (''Sciurus anomalus'') or Persian squirrel, is a tree squirrel in the genus ''Sciurus'' found in temperate broadleaf and mixed forests in south-western Asia.
The species is usually said to have first been described in 1778 ...
Junín red squirrel
The Junín red squirrel (''Sciurus pyrrhinus'') is a species of squirrel from Peru and Ecuador.
Description
The Junín red squirrel is a relatively large tree squirrel, having a head-body length of about . The majority of the body is covered in ...
Western gray squirrel
The western gray squirrel (''Sciurus griseus'') is a tree squirrel found along the western coast of the United States and Mexico. In some places, this species has also been known as the silver-gray squirrel, the California gray squirrel, the Or ...
, ''S. griseus''
***Subgenus ''Urosciurus''
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Northern Amazon red squirrel
The northern Amazon red squirrel (''Sciurus igniventris'') is a squirrel species from South America. It occurs in Brazil, Colombia, Ecuador, Peru and Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, ...
, ''S. igniventris''
****
Southern Amazon red squirrel
The southern Amazon red squirrel (''Sciurus spadiceus''), is a squirrel species from South America where it inhabits forests in much of north-western South America east of the Andes. Three subspecies are currently recognised. It is a dark red col ...
, ''S. spadiceus''
**Genus ''
Syntheosciurus
Bangs's mountain squirrel (''Syntheosciurus brochus'') is a poorly known species of tree squirrel, that only lives in Costa Rica and Panama. It can be found in mountain rain forests at an altitude between , and lives mainly in the tree tops, but ...
''
***
Bangs's mountain squirrel
Bangs's mountain squirrel (''Syntheosciurus brochus'') is a poorly known species of tree squirrel, that only lives in Costa Rica and Panama. It can be found in mountain rain forests at an altitude between , and lives mainly in the tree tops, but ...
, ''S. brochus''
**Genus ''
Tamiasciurus
Pine squirrels are squirrels of the genus ''Tamiasciurus'', in the Sciurini tribe, of the large family Sciuridae.
Species
This genus includes three species:
*''Tamiasciurus hudsonicus'' — American red squirrel
*''Tamiasciurus douglasii'' ...
'' - pine squirrels
***
Douglas squirrel
The Douglas squirrel (''Tamiasciurus douglasii'') is a pine squirrel found in the Pacific Northwest of North America, including the northwestern coastal states of the United States as well as the southwestern coast of British Columbia in Canada, ...
, ''T. douglasii''
***
Southwestern red squirrel
The southwestern red squirrel or Fremont's squirrel (''Tamiasciurus fremonti'') is a species of tree squirrel endemic to high-altitude regions of the southwestern United States.
Taxonomy
It was formerly considered conspecific with the Americ ...
''T. fremonti''
***
American red squirrel
The American red squirrel (''Tamiasciurus hudsonicus'') is one of three species of tree squirrels currently classified in the genus ''Tamiasciurus'', known as the pine squirrels (the others are the Douglas squirrel, ''T. douglasii'', and the sou ...
, ''T. hudsonicus''
***
Mearns's squirrel
Mearns's squirrel (''Tamiasciurus douglasii mearnsi'') is a subspecies of the Douglas squirrel Endemism, endemic to Mexico. It is endangered species, endangered and occurs in low densities, and is threatened by habitat loss.Koprowski, Ramos, Pasc ...
Eoglaucomys
The Kashmir flying squirrel (''Eoglaucomys fimbriatus'') is a species of rodent in the family Sciuridae. It is monotypic within the genus ''Eoglaucomys''. It is found in Afghanistan, India and Pakistan. Its natural habitat is subtropical or trop ...
''
****
Kashmir flying squirrel
The Kashmir flying squirrel (''Eoglaucomys fimbriatus'') is a species of rodent in the family Sciuridae. It is monotypic within the genus ''Eoglaucomys''. It is found in Afghanistan, India and Pakistan. Its natural habitat is subtropical or trop ...
, ''E. fimbriatus''
***Genus '' Glaucomys'' – New World flying squirrels
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Southern flying squirrel
The southern flying squirrel or the assapan (''Glaucomys volans'') is one of three species of the genus '' Glaucomys'' and one of three flying squirrel species found in North America. It is found in deciduous and mixed woods in the eastern half o ...
, ''G. volans''
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Northern flying squirrel
The northern flying squirrel (''Glaucomys sabrinus'') is one of three species of the genus '' Glaucomys'', the only flying squirrels found in North America.Walker EP, Paradiso JL. 1975. ''Mammals of the World''. Baltimore: Johns Hopkins Universi ...
, ''G. sabrinus''
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Humboldt's flying squirrel
Humboldt's flying squirrel (''Glaucomys oregonensis'') is one of three species of the genus '' Glaucomys'', the only flying squirrels found in North America. The squirrel was named after the naturalist Alexander von Humboldt and California's H ...
, ''G. oregonensis''
***Genus ''
Hylopetes
''Hylopetes'' is a genus of flying squirrels. There are about 10 species.
Species include:
* Particolored flying squirrel - ''H. alboniger'' (Hodgson, 1836)
* Bartel's flying squirrel - ''H. bartelsi'' Chasen, 1939
* Hainan flying squirrel - '' ...
''
****
Particolored flying squirrel
The particolored flying squirrel (''Hylopetes alboniger'') is a species of rodent in the family Sciuridae. It is found in Bangladesh, Bhutan, Cambodia, China, India, Laos, Myanmar, Nepal, Thailand, and Vietnam. Its natural habitat is subtropical ...
, ''H. alboniger''
****
Afghan flying squirrel
The Afghan flying squirrel (''Eoglaucomys fimbriatus baberi'') is a subspecies of rodent in the family Sciuridae. It is endemic to Afghanistan.
Biology
The Afghan flying squirrel is not considered to be threatened to become an endangered specie ...
, ''H. baberi''
****
Bartel's flying squirrel
The Bartel's flying squirrel (''Hylopetes bartelsi'') is a rodent species in the family Sciuridae endemic to West Java, Indonesia. It inhabits subtropical and tropical forest.
Name
The Bartel's flying squirrel was named after Dutch
Dutch com ...
Palawan flying squirrel
The Palawan flying squirrel or ''tapilak'' (''Hylopetes nigripes'') is a species of rodent in the family Sciuridae. It is endemic to the Philippines.
Its natural habitat is subtropical or tropical dry forest
A forest is an area of land d ...
, ''H. nigripes''
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Indochinese flying squirrel
The Indochinese flying squirrel (''Hylopetes phayrei''), also known as Phayre's flying squirrel, is a species of rodent in the family Sciuridae. It is found in China, Laos, Myanmar, Thailand, and Vietnam
Vietnam or Viet Nam ( vi, Việ ...
, ''H. phayrei''
****
Jentink's flying squirrel
The Jentink’s flying squirrel (''Hylopetes platyurus'') is a species of squirrel native to Indonesia and Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and fede ...
, ''H. platyurus''
****
Sipora flying squirrel
The Sipora flying squirrel (''Hylopetes sipora'') is a species of rodent in the family Sciuridae. It is endemic to Indonesia.
Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss
Habitat destruction ...
, ''H. sipora''
****
Red-cheeked flying squirrel
The red-cheeked flying squirrel (''Hylopetes spadiceus'') is a species of rodent in the family Sciuridae. It is found in Indonesia, Malaysia, Myanmar, Singapore, Thailand, and Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially t ...
, ''H. spadiceus''
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Sumatran flying squirrel
The Sumatran flying squirrel (''Hylopetes winstoni'') is a flying squirrel only found on the island of Sumatra. It is listed as data deficient on the IUCN red list. Originally discovered in 1949, it is known only from a single specimen. It is ...
, ''H. winstoni''
***Genus ''
Iomys
''Iomys'' is a small genus of rodent in the family Sciuridae
Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels (including chip ...
Lesser pygmy flying squirrel
The lesser pygmy flying squirrel (''Petaurillus emiliae'') is a species of rodent
Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each ...
Petinomys
''Petinomys'' is a genus of flying squirrels. They are known commonly as the dwarf flying squirrels.Basilan flying squirrel, ''P. crinitus''
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Travancore flying squirrel
Travancore flying squirrel (''Petinomys fuscocapillus''), also known as the small flying squirrel, is a flying squirrel found in South India and Sri Lanka. Travancore flying squirrels were thought to be extinct but were rediscovered in 1989 aft ...
, ''P. fuscocapillus''
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Whiskered flying squirrel
The whiskered flying squirrel (''Petinomys genibarbis'') is a species of flying squirrel. It is found in Indonesia and Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of St ...
Siberut flying squirrel
The Siberut flying squirrel (''Petinomys lugens'') is a species of rodent in the family Sciuridae. It is endemic to Indonesia. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss
Habitat destruction ...
, ''P. lugens''
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Mindanao flying squirrel
The Mindanao flying squirrel (''Petinomys mindanensis'') is a common species of squirrel that is endemic to the Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pil ...
, ''P. mindanensis''
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Arrow flying squirrel
The arrow flying squirrel (''Hylopetes sagitta'') is a species of flying squirrel. It is endemic to Java and Bangka, Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indi ...
Vordermann's flying squirrel
Vorderman's flying squirrel (''Petinomys vordermanni'') is a species of rodent in the family Sciuridae. It is found in Indonesia, Malaysia, and Myanmar. It was described in 1890 by the Dutch zoologist Fredericus Anna Jentink, who named it after it ...
Aeretes
''Aeretes'' is a genus of squirrels that contains a single extant species, the groove-toothed flying squirrel ''(Aeretes melanopterus)''.
Two fossil species are also known from Late Pliocene
Late may refer to:
* LATE, an acronym which could s ...
''
****
Groove-toothed flying squirrel
The groove-toothed flying squirrel or North Chinese flying squirrel (''Aeretes melanopterus'') is a species of rodent in the family Sciuridae. It is monotypic within the genus ''Aeretes''.
It is endemic to China, and occurs in Sichuan, Gansu, He ...
, ''A. melanopterus''
***Genus '' Aeromys'' – large black flying squirrels
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Black flying squirrel
The black flying squirrel or large black flying squirrel (''Aeromys tephromelas'') is a species of rodent in the family Sciuridae. It is found in Brunei, Indonesia, and Malaysia; its habitat is primary and secondary forests and gardens where it u ...
, ''A. tephromelas''
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Thomas's flying squirrel
Thomas's flying squirrel (''Aeromys thomasi'') is a species of rodent in the family Sciuridae. It is one of two species in the genus ''Aeromys''. It is found in Indonesia and Malaysia.
References
*Thorington, R. W. Jr. and R. S. Hoffman. 200 ...
Namdapha flying squirrel
The Namdapha flying squirrel (''Biswamoyopterus biswasi'') is an arboreal, nocturnal flying squirrel endemic to Arunachal Pradesh in northeast India, where it is known from a single specimen collected in Namdapha National Park in 1981. No po ...
, ''B. biswasi''
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Laotian giant flying squirrel
The Laotian giant flying squirrel (''Biswamoyopterus laoensis'') is an arboreal, flying squirrel endemic to Laos. It was the second described member in the genus ''Biswamoyopterus'', after being first collected in September 2012 by scientists res ...
Petaurista
''Petaurista'' is a genus of rodent in the family Sciuridae. They are large to very large flying squirrels found in forests and other wooded habitats in southern and eastern Asia.
Like other flying squirrels, they are mostly nocturnal and abl ...
Spotted giant flying squirrel
The spotted giant flying squirrel (''Petaurista elegans''), also known as the lesser giant flying squirrel, is a species of rodent in the family Sciuridae. It is found in hill and mountain forests at altitudes of in Southeast Asia north to centr ...
, ''P. elegans''
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Hodgson's giant flying squirrel
Hodgson's giant flying squirrel (''Petaurista magnificus'') is a species of rodent in the family Sciuridae. This large flying squirrel lives in Himalayan forests in Asia. Like other flying squirrels, it is nocturnal and able to glide (not act ...
, ''P. magnificus''
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Bhutan giant flying squirrel
The Bhutan giant flying squirrel (''Petaurista nobilis''), also known as the Gray's giant flying squirrel or noble giant flying squirrel, is a species of rodent in the family Sciuridae. This species lives in Himalayan forests and it is one of th ...
, ''P. nobilis''
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Indian giant flying squirrel
The Indian giant flying squirrel (''Petaurista philippensis''), also called the large brown flying squirrel or the common giant flying squirrel, is a species of rodent in the family Sciuridae. It is capable of gliding flight using a skin membrane ...
, ''P. philippensis''
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Chinese giant flying squirrel
The Chinese giant flying squirrel (''Petaurista xanthotis'') is a species of rodent in the family Sciuridae. It is endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nat ...
, ''P. xanthotis''
****
Japanese giant flying squirrel
The is a species of flying squirrel, one of the giant flying squirrels in the genus ''Petaurista''. Description
Like other flying squirrels, it has a web of skin between its legs which it uses to glide between trees. Glides of 160 metres have ...
, ''P. leucogenys''
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Red giant flying squirrel
The red giant flying squirrel or common giant flying squirrel (''Petaurista petaurista'') is a species of rodent in the family Sciuridae (squirrels). It is found in a wide variety of forest–types, plantations and more open habitats with scatter ...
, ''P. petaurista''
***Genus '' Pteromys'' – Old World flying squirrel
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Siberian flying squirrel
The Siberian flying squirrel (''Pteromys volans'') is an Old World flying squirrel ranging from the Baltic Sea in the west, throughout Northern Asia to the coast of the Pacific Ocean in the east. It is the only species of flying squirrel in Euro ...
, ''P. volans''
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Japanese dwarf flying squirrel
The Japanese dwarf flying squirrel (''Pteromys momonga''; Japanese: ニホンモモンガ, Hepburn: ''Nihon momonga'') is one of two species of Old World flying squirrels in the genus ''Pteromys''. During the day this squirrel hides in a hole, ...
, ''P. momonga''
***Genus ''Pteromyscus''
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Smoky flying squirrel
The smoky flying squirrel (''Pteromyscus pulverulentus'') is a species of rodent in the family Sciuridae. It is monotypic within the genus ''Pteromyscus''. It is found in parts of Brunei, Indonesia, Peninsular Malaysia, and southern Thailand, bu ...
, ''P. pulverulentus''
***Genus ''
Trogopterus
The complex-toothed flying squirrel (''Trogopterus xanthipes'') occurs in the southern Chinese provinces Hubei, Hunan, Guizhou, Sichuan, and Yunnan. The common name refers to the teeth, which differ from those of other species of flying squirre ...
''
****
Complex-toothed flying squirrel
The complex-toothed flying squirrel (''Trogopterus xanthipes'') occurs in the southern Chinese provinces Hubei, Hunan, Guizhou, Sichuan, and Yunnan. The common name refers to the teeth, which differ from those of other species of flying squirrel ...