Sundasciurus fraterculus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Sundasciurus fraterculus
Species Authority: (Thomas, 1895)
Common Name(s):
English Fraternal Squirrel
Taxonomic Notes: Sometimes this species is included within S. lowii (Chasen 1940).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(ii,iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Helgen, K. & Aplin, K.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
This species is assessed as Endangered because its extent of occurrence is not much greater than 5,000 km2, its habitat is severely fragmented and it is experiencing rapid, continuing decline in the extent and quality of habitat. Insufficient information exists on remaining forest to assess whether its area of occupancy is less than 500 km2, but it probably meets the B2 criteria as well. Based on rates of habitat loss, it may also meet A4 criteria for Endangered, but the experts felt uncomfortable making an assumption of a 50% population decline.

Geographic Range [top]

Range Description: This species is found only on Mentawai Archipelago (Siberut, Sipora, North and South Pagai islands) off the west coast of Sumatra, Indonesia.
Indonesia (Sumatera)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The abundance and population size of this species are not known, but likely declining because it is forest dependent.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This species lives in lowland evergreen forests.
Systems: Terrestrial

Threats [top]

Major Threat(s): It is threatened by deforestation due to illegal logging.

Conservation Actions [top]

Conservation Actions: It is not known if the species is present in any protected areas. Further studies are needed into the distribution and abundance of this species.

Citation: Helgen, K. & Aplin, K. 2008. Sundasciurus fraterculus. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 04 September 2015.
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