The Lake Sentarum National Park ( id, Taman Nasional Danau Sentarum) is a
national park
A national park is a nature park, natural park in use for conservation (ethic), conservation purposes, created and protected by national governments. Often it is a reserve of natural, semi-natural, or developed land that a sovereign state dec ...
protecting one of the world's most biodiverse lake systems, located in the heart of Borneo Island, Kapuas Hulu Regency, West Kalimantan Province, Indonesia. It lies in the upper Kapuas River tectonic basin some 700 kilometres upstream from the delta. The basin is a vast floodplain, consisting of about 20 seasonal lakes, freshwater swamp forest and peat swamp forest. Local people call it as Lebak lebung (floodplain). The National Park is located in the western part of this basin, where three-quarters of the seasonal lakes occur. Approximately half of the park consists of lakes, while the other half consists of freshwater swamp forest.
An area of 800 km2 was first gazetted as Wildlife Reserve in 1982, which in 1994 was extended to 1,320 km2 (890 km2 is swamp forest area and 430 km2 is dry-land) when it became a
Ramsar site
A Ramsar site is a wetland site designated to be of international importance under the Ramsar Convention,8 ha (O)
*** Permanent 8 ha (P)
*** Seasonal Intermittent < 8 ha(Ts)
**
Storm's stork
Storm's stork (''Ciconia stormi'') is a medium-sized stork species that occurs primarily in lowland tropical forests of Indonesia, Malaysia and southern Thailand. It is considered to be the rarest of all storks,Hancock JA, Kuschlan JA, Kahl, MP. ...
and great argus. Of the 143 mammal species 23 are endemic to Borneo including the
proboscis monkey
The proboscis monkey (''Nasalis larvatus'') or long-nosed monkey is an arboreal Old World monkey with an unusually large nose, a reddish-brown skin color and a long tail. It is endemic to the southeast Asian island of Borneo and is found mostly ...
. There is a relatively large population of the endangered orangutans present in the park. The 26 reptile species include the
false gharial
The false gharial (''Tomistoma schlegelii''), also known by the names Malayan gharial, Sunda gharial and tomistoma is a freshwater crocodilian of the family Gavialidae native to Peninsular Malaysia, Borneo, Sumatra and Java. It is listed as Vu ...
Heart of Borneo
The Heart of Borneo is a conservation agreement initiated by the World Wide Fund for Nature to protect a 220,000 km² forested region on Borneo island. The agreement was signed by the governments of Brunei, Indonesia and Malaysia in Bali on 1 ...