Sundasciurus hippurus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Sundasciurus hippurus
Species Authority: (I. Geoffroy, 1831)
Common Name(s):
English Horse-tailed Squirrel

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Francis, C., Meijaard, E. & Han, K.H.
Reviewer(s): Amori, G. (Small Nonvolant Mammal Red List Authority) & Schipper, J. (Global Mammal Assessment Team)
Listed as Near Threatened because it is experiencing habitat loss throughout its range, but given that it can be found in secondary forest, it does not meet the threshold of at least 30% population decline inferred from continuing habitat loss. Almost qualifies as threatened under criterion A2c.

Geographic Range [top]

Range Description: This species is found in the lowland areas of peninsular Thailand and Malaysia, Borneo and Sumatra.
Brunei Darussalam; Indonesia (Kalimantan, Sumatera); Malaysia (Peninsular Malaysia, Sabah, Sarawak); Thailand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is common in suitable habitat, though it is not often recorded (Han and Giman pers. comm.). This species was the second most abundant of its genus found in a survey conducted by Saiful and Nordin (2004) in Peninsular Malaysia (Weng River sub-catchment), with a density of 3.93 ± 2.33 individuals/km2. In general, this species is found at low densities in unlogged forest in Malaysia. In Danum Valley, Sabah, Norhayati (2001) found 19.9 individuals/km2, while Zainuddin et al. (1996) found 2.42 individuals/km2 in Nanga Gaat, Sarawak.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It prefers primarily lowland forest, but is also found in secondary forests, though in declining number. It is typically found on the ground and lower in trees (Han pers. comm.). This is a diurnal and arboreal species (Saiful and Nordin 2004), but it often descends to the ground (Han pers. comm.). It has been suggested that one of the reasons for low densities of this species in Malaysian tropical rain forest is competition from the great variety of other arboreal vertebrates (such as birds, and especially primates) for food, especially fruits and leaves, which are among the food items preferred by squirrels (Saiful and Nordin, 2004).
Systems: Terrestrial

Threats [top]

Major Threat(s): It is threatened by habitat loss due to logging and agricultural conversation (Han pers. comm.).

Conservation Actions [top]

Conservation Actions: It is found in several protected areas, including Pasoh Forest Reserve (Han pers. comm.). Saiful and Nordin (2004) state the need for further comparative study on this species' abundance, density and distribution and its relationship to forest structure or habitat quality, spatially and temporally, in hill dipterocarp forest of Malaysia.

Citation: Francis, C., Meijaard, E. & Han, K.H. 2008. Sundasciurus hippurus. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 29 March 2015.
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