Tupaia javanica
Silhouette: Margot Michaud · PhyloPic
In 3 days ~80% in a week >90%
Horsfield's treeshrew (Tupaia javanica), also called Javan treeshrew, is a treeshrew species within the Tupaiidae. It is endemic to the Indonesian islands of Sumatra, Bali, Java and Nias where it inhabits foremost primary forest.
It was first described by Thomas Horsfield in 1822. Several subspecies have been proposed based on variation in colouration; however, colour is an unreliable distinguishing character. There are many variations of papillae on the surface of the Horsfield's treeshrew's tongue, which depend on the food it eats as well as the pattern and function of its tongue. The Horsfield's treeshrew has a unique skull shape that better suits its environment and differs from other treeshrew species.
The Horsfield's treeshrew eats fruits and insects while mostly consuming arthropods. It spreads plants seeds and controls insects, and therefore plays a significant role in the ecosystem; it has a special ability to adapt to agroforestry systems.
Data related to Tupaia javanica at Wikispecies Wikipedia →
Call1:19
Indonesia · 2015
© Marc Anderson · XC1014192 · CC BY-NC-ND 4.0
Recording0:29
Indonesia · 2018
© Bruno Durand · iNaturalist · CC BY-NC 4.0
Recording0:43
Indonesia · 2021
© ꦥꦤ꧀ꦗꦶꦒꦸꦱ꧀ꦠꦶꦄꦏ꧀ꦧꦂ · iNaturalist · CC BY 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bali Barat National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
No species of the same family or order lives in Bali Barat National Park, so these are its closest relatives here: other mammals.
Likely
About 40% of wildlife watchers report a Horsfield's Treeshrew sighting in Bali Barat National Park on a given day, based on 22 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 9 mammals we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
July–September and November
In those months about 50% of wildlife watchers report a Horsfield's Treeshrew in Bali Barat National Park on a given day, against under 5% in April, the lowest month. Those are among Bali Barat National Park's driest months, with about 55 mm of rain a month against 280 mm in February.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Horsfield's Treeshrew sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Only Bali Barat National Park, in our data
Bali Barat National Park is the only park on Wallace's Line with enough records to rate Horsfield's Treeshrew sightings: about 40% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Horsfield's Treeshrew is recorded against all the mammals logged in Bali Barat National Park (22 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
