Horsfield's Treeshrew or Javan Treeshrew (Tupaia javanica) is a species of treeshrew

Treeshrew

The treeshrews are small mammals native to the tropical forests of Southeast Asia. They make up the families Tupaiidae, the treeshrews, and Ptilocercidae, the pen-tailed treeshrews, and the entire order Scandentia. There are 20 species in 5 genera...

 in the Tupaiidae

Tupaiidae

Tupaiidae is one of two families of treeshrews, the other family being Ptilocercidae. It contains 4 genera and 19 species.-Taxonomy:*Order: Scandentia** Family Tupaiidae*** Genus Anathana**** Madras Treeshrew, Anathana ellioti...

 family. It is endemic to Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

.

First described by Thomas Horsfield

Thomas Horsfield

Thomas Horsfield M. D. was an American physician and naturalist.Horsfield was born in Bethlehem, Pennsylvania, and studied medicine at the University of Pennsylvania. He was the grandson of Timothy Horsfield, Sr., a colonel and justice of the peace in Bethlehem, and a friend mentioned in Benjamin...

 in 1822, the habitat requirements of Horsfield's Treeshrew are still undocumented. The species can be found on several Indonesian islands: Bali

Bali

Bali is an Indonesian island located in the westernmost end of the Lesser Sunda Islands, lying between Java to the west and Lombok to the east...

, Java

Java

Java is an island of Indonesia. With a population of 135 million , it is the world's most populous island, and one of the most densely populated regions in the world. It is home to 60% of Indonesia's population. The Indonesian capital city, Jakarta, is in west Java...

, West Sumatra

West Sumatra

West Sumatra is a province of Indonesia. It lies on the west coast of the island Sumatra. It borders the provinces of North Sumatra to the north, Riau and Jambi to the east, and Bengkulu to the southeast. It includes the Mentawai Islands off the coast...

, and Nias

Nias

Nīas is an island off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago, containing the Hinako archipelago....

. Several subspecies have been proposed based on variation in colourisation; however, colour is an unreliable distinguishing character.