Tupaia javanica Horsfield 1822

11.

Horsfield’s Treeshrew

Tupaia javanica

French: Toupaye de Horsfield / German: Horsfield-Spitzhérnchen / Spanish: Tupaya de Horsfield

Other common names: Javan Treeshrew

Taxonomy. Tupaia javanica Horsfield, 1822,

“Java, Province of Blambangan,” In- donesia. Restricted by M. W. Lyon, Jr. in 1913 to “probably near the present town of Banyu-wangi at extreme eastern end of Java.”

Several subspecies of T. javanica (balina, bogoriensis, occidentalis, tjibuniensis) have been proposed based on variation in color, but variation is found in single locations; following K. M. Helgen in 2005, they

are considered synonyms pending additional study. Monotypic.

Distribution. W Sumatra and Nias I, Java, and Bali.

Descriptive notes. Head—body 130-150 mm, tail 145-175 mm, ear 7-15 mm, hindfoot 33-38 mm. No specific data are available on body weight. Horsfield’s Treeshrew is slender, with uniform agouti-brown pelage; tail fur is relatively thick and c.15 mm in length; venteris tan; and rostrum is short.

Habitat. Primary forests up to elevations of ¢.1700 m. It appears that Horsfield’s Treeshrew is only found in primary forests and not degraded habitats.

Food and Feeding. There is no specific information available for this species, but Horsfield’s Treeshrew is presumably a generalist, eating fruits and insects.

Breeding. No information.

Activity patterns. Horsfield’s Treeshrew is diurnal and arboreal.

Movements, Home range and Social organization. No information.

Status and Conservation. CITES Appendix II. Classified as Least Concern on The [UCN Red List. Nevertheless, like many treeshrew species, Horsfield’s Treeshrew is thought to be declining, with an estimated 20-30% population decline in the past decade due to loss offorest habitat. Additional studies on genetic diversity of Horsfield’s Treeshrew across Java and its basic ecology would benefit assessments of its conservation status.

Bibliography. Helgen (2005), Lyon (1913).