Siberian flying squirrel

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Siberian flying squirrel
Pteromys volans.jpg
next to nesthole
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Sciuridae
Genus: Pteromys
Species:
P. volans
Binomial name
Pteromys volans
Subspecies
  • P. v. volans
  • P. v. athene
  • P. v. buechneri
  • P. v. orii
Pteromys volans range map.svg
Siberian flying squirrel range
Synonyms

Sciurus volansLinnaeus, 1758

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 Europe and is considered vulnerable in the European Union where it occurs only in Estonia and Finland. [2] In Latvia, it was last sighted in 2001 and has been considered to be locally extinct since 2013. [3]

Contents

Description

A female Siberian flying squirrel weighs about 150 grams, the males being slightly smaller on average. The body is 13–20 cm long, with a 9–14 cm long flattened tail. The eyes are large and strikingly black. The coat is grey all over, the abdomen being slightly lighter than the back, with a black stripe between the neck and the forelimb. A distinctive feature of flying squirrels is the furry glide membrane or patagium, a flap of skin that stretches between the front and rear legs. By spreading this membrane the flying squirrel may glide from tree to tree across distances of over a hundred meters, and have been known to record a glide ratio of 3.31, but is normally 1-1.5. [4]

Behavior

Diet

Its diet consists of leaves, seeds, cones, buds, sprouts, nuts and berries. [5] [6] Local hunters claim that they occasionally eat bird eggs and nestlings, however, there is no evidence of this behavior. [5] When alder and birch catkins are plentiful, the squirrel may store them for the winter in old woodpecker holes or similar nooks.[ citation needed ]

Siberian flying squirrel in the forest Letiaga.jpg
Siberian flying squirrel in the forest

Reproduction

They mate early in the spring. In southern Finland the first mating season begins in late March, with a second mating season occurring in April. After a gestation period of five weeks, the female gives birth to a litter of usually two or three young, each weighing about 5 grams. [7] They preferentially build their nest in holes made by woodpeckers, but they may also nest in birdhouses if the size of the entrance is appropriate. The nest consists of a pile of soft materials (preferably soft beard lichen) into which the squirrel burrows. They can live up to about five years.

Habitat

Feces of Siberian flying squirrel. Lendorava pabulad.jpg
Feces of Siberian flying squirrel.

They favor old forests with a mix of conifers and deciduous trees. They are mostly nocturnal, being most active late in the evening, although females with young may also feed during the day. They do not hibernate, but in the winter they may sometimes sleep continuously for several days. As shy and nocturnal animals, they are seldom seen. The most common sign of their presence is their droppings, which resemble orange-yellow rice grains and are often found beneath or on top of their nest.

Predators

The squirrels are preyed upon by martens, hawks, owls, dogs and cats.

In human culture

It is the emblem of Nuuksio National Park in Espoo municipality of Finland due to the density of the population in this region. [8]

In Estonia, the Siberian flying squirrel is depicted on the logo of the Estonian Nature Fund. [9]

Threats

The Siberian flying squirrel photographed in Klaukkala, Finland, at night in 2006. Liito-orava5.jpg
The Siberian flying squirrel photographed in Klaukkala, Finland, at night in 2006.

In Finland and especially the Baltic states, the Siberian flying squirrel has been at risk potentially becoming an endangered species. P. volans is already extirpated from Lithuania. Since 1996, it was also considered extinct in Belarus, until being spotted again in 2017, with more than 80 habitats subsequently discovered in far northern regions of the country in 2019. [10] Acts that are believed to be contributors to the decrease in the population size are habitat fragmentation, climate, and habitat loss in places they reside like boreal forests and old-spruce-dominated forests. [11] Because Finland is a member of the European Union, the squirrel is under the protection of the EU's 1992 Habitats Directive. The EU, Finland and Estonia have responded with a six-year, 8.9 million euro project to help protect the squirrel. [12]

Related Research Articles

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The sugar glider is a small, omnivorous, arboreal, and nocturnal gliding possum. The common name refers to its predilection for sugary foods such as sap and nectar and its ability to glide through the air, much like a flying squirrel. They have very similar habits and appearance to the flying squirrel, despite not being closely related—an example of convergent evolution. The scientific name, Petaurus breviceps, translates from Latin as "short-headed rope-dancer", a reference to their canopy acrobatics.

<span class="mw-page-title-main">Colugo</span> Family of mammals

Colugos are arboreal gliding mammals that are native to Southeast Asia. Their closest evolutionary relatives are primates. There are just two living species of colugos: the Sunda flying lemur and the Philippine flying lemur. These two species make up the entire family Cynocephalidae and order Dermoptera.

<span class="mw-page-title-main">Flying squirrel</span> Tribe of mammals

Flying squirrels 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 are able to glide from one tree to another with the aid of a patagium, a furred skin membrane that stretches from wrist to ankle. Their long tails also provide stability as they glide. Anatomically they are very similar to other squirrels with a number of adaptations to suit their lifestyle; their limb bones are longer and their hand bones, foot bones, and distal vertebrae are shorter. Flying squirrels are able to steer and exert control over their glide path with their limbs and tail.

<span class="mw-page-title-main">Southern flying squirrel</span> Species of rodent

The southern flying squirrel or the assapan is one of three species of flying squirrel found in North America. It is found in deciduous and mixed woods in the eastern half of North America, from southeastern Canada to Florida. Disjunct populations of this species have been recorded in the highlands of Mexico, Guatemala, and Honduras.

<span class="mw-page-title-main">Northern flying squirrel</span> Species of rodent

The northern flying squirrel is one of three species of the genus Glaucomys, the only flying squirrels found in North America. They are found in coniferous and mixed coniferous forests across much of Canada, from Alaska to Nova Scotia, and south to the mountains of North Carolina and west to Utah in the United States. They are light brown with pale underparts and grow to a length of 25 to 37 cm. They are proficient gliders but uncoordinated walkers on the ground. They feed on a variety of plant material as well as tree sap, fungi, insects, carrion, bird eggs and nestlings. They mostly breed once a year in a cavity lined with lichen or other soft material. Except when they have young, they change nests frequently, and in winter a number of individuals may huddle together in a shared nest. Unlike most members of their family, flying squirrels are strictly nocturnal.

<span class="mw-page-title-main">Squirrel glider</span> Species of marsupial

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<span class="mw-page-title-main">Red-cockaded woodpecker</span> Species of bird

The red-cockaded woodpecker is a woodpecker endemic to the southeastern United States.

<span class="mw-page-title-main">Nuuksio National Park</span> National park in Uusimaa, Finland

Nuuksio National Park is one of Finland's 40 national parks. Established in 1994, the park spreads over an area of forests and lakes in Espoo, Kirkkonummi and Vihti. North-west from Helsinki, it is the second-closest national park to the capital behind the recently established Sipoonkorpi National Park. The name is derived from the Nuuksio district of Espoo.

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<span class="mw-page-title-main">Sunda flying lemur</span> Species of mammal

The Sunda flying lemur, also called Malayan flying lemur and Malayan colugo is the sole colugo species of the genus Galeopterus. It is native to Southeast Asia from southern Myanmar, Thailand, southern Vietnam, Malaysia to Singapore and Indonesia and listed as Least Concern on the IUCN Red List. Although it is called "flying lemur", it cannot fly but glides among trees and is strictly arboreal. It is active at night, and feeds on soft plant parts such as young leaves, shoots, flowers, and fruits. It is a forest-dependent species.

<span class="mw-page-title-main">Greater glider</span> Genus of marsupials

The greater gliders are three species of large gliding marsupials in the genus Petauroides, all of which are found in eastern Australia. Until 2020 they were considered to be one species, Petauroides volans. In 2020 morphological and genetic differences, obtained using diversity arrays technology, showed there were three species subsumed under this one name. The two new species were named Petauroides armillatus and Petauroides minor.

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<span class="mw-page-title-main">Pel's flying squirrel</span> Species of rodent

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<span class="mw-page-title-main">Japanese dwarf flying squirrel</span> Species of rodent

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<span class="mw-page-title-main">Ezo flying squirrel</span> Subspecies of mammal

The Ezo flying squirrel or Ezo-momonga is a subspecies of the Siberian flying squirrel. It is endemic to Hokkaidō, Japan, part of the region once known as Ezo. In the legends of the local Ainu, the Ezo flying squirrel or A-kamui is a tutelary deity of children. Together with the Ezo chipmunk and Ezo squirrel, it is one of the three sciurids found on the island, to the north of Blakiston's Line, each having its own particular ecological niche.

References

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  2. "Pteromys volans (Linnaeus, 1758)". www.gbif.org. Retrieved 2023-05-19.
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  9. Estonian Nature Fund – Flying squirrel (in English)
  10. "Flying squirrel". Дзікая прырода побач (in Russian). 2020-06-30. Retrieved 2023-01-16.
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