Overview

Distribution

Range Description

This species is endemic to Japan. It is widely distributed in north-eastern Honshu, and is rare in western Honshu, from the Chugoku District (Japan RDB, 2002; Abe, et al., 2005). It is also found on Shikoku (Japan RDB, 2002; Abe, et al., 2005), and on Awaji Island, where there have been no recent sightings (Abe, et al., 2005). It is unclear whether the species ever occurred on Kyushu.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species is found in lowland to subalpine primary and secondary pine forests.

Systems
  • Terrestrial
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Life History and Behavior

Life Expectancy

Lifespan, longevity, and ageing

Observations: Little is known about the longevity of these animals, but one specimen lived 8.9 years in captivity (Richard Weigl 2005).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2008

Assessor/s
Ishii, N. & Kaneko, Y.

Reviewer/s
Amori, G. (Small Nonvolant Mammal Red List Authority) & Chanson, J. (Global Mammal Assessment Team)

Contributor/s

Justification
Listed as Least Concern, because it is relatively widespread, common throughout most of its range, and there are no major threats to the species overall.
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Population

Population
It is common over most of its range, but rare in some parts, such as western Honshu. It can occur at relatively large densities in lower montane pine forests (Abe, et al., 2005).

Population Trend
Stable
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Threats

Major Threats
There are no major threats, although the population has possibly been affected by die-offs of native pine trees due to an invasive disease (Japan RDB, 2002). The impact of the introduction of Sciurus vulgaris around Tokyo (in the late 1990s) and other areas requires further investigation to determine whether the two species are competing or hybridizing.
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Management

Conservation Actions

Conservation Actions
It is present in a number of protected areas. Research into the impact of the introduced species Sciurus vulgaris is needed.
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Wikipedia

Japanese squirrel

The Japanese squirrel (Sciurus lis) is a tree squirrel in the genus Sciurus endemic to Japan. The Japanese squirrel's range includes the islands of Honshū, Shikoku, and Kyūshū. Recently, populations on south-western Honshū and Shikoku decreased, and those on Kyūshū disappeared. One of the factors affecting the local extinction of this species seems to be forest fragmentation by humans.

References[edit]

  1. ^ Ishii, N. & Kaneko, Y. (2008). Sciurus lis. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 6 January 2009.
  2. ^ Thorington, R.W., Jr.; Hoffmann, R.S. (2005). "Sciurus (Sciurus) lis". In Wilson, D.E.; Reeder, D.M. Mammal Species of the World: a taxonomic and geographic reference (3rd ed.). The Johns Hopkins University Press. pp. 754–818. ISBN 0-8018-8221-4. OCLC 26158608. 
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