A Mountain Alive with Life

Mount Rinjani and its surrounding national park protect one of the most ecologically diverse environments in Wallacea — the biogeographical zone named after Alfred Russel Wallace, where Asian and Australasian species meet. The park covers over 41,000 hectares of tropical forest, montane forest, savanna, and volcanic landscape, supporting an impressive array of flora and fauna found nowhere else on Earth.

Mammals of the Forest

Lombok Black Monkey (Macaca fascicularis)

The long-tailed macaque is perhaps the most commonly sighted mammal on the Rinjani trails, particularly in the forested lower slopes of the Senaru route. These highly social primates are curious and bold — keep food securely packed and avoid feeding them, as this disrupts natural behaviour and can make them aggressive.

Rusa Deer (Rusa timorensis)

The Rusa deer, also called the Javan rusa, roams the savanna zones of the Sembalun route. Dawn and dusk are the best times to spot these elegant animals grazing in the open grasslands. They are generally shy and will bolt at human approach, so quiet, slow movement is rewarded.

Wild Boar (Sus scrofa)

Wild boar are present throughout the park's forested zones. Signs of rooting and digging are commonly found along trails. Encounters are rare but possible — keep a respectful distance if you do spot one, particularly if young are nearby.

Birds: A Birdwatcher's Destination

Rinjani National Park is one of Lombok's top birdwatching destinations, with many species endemic to the island or the Lesser Sunda islands.

  • Rinjani Scops Owl (Otus jolandae): Described as a new species only in 2013, this small owl is endemic to Lombok and detectable by its distinctive call at dusk in forest zones.
  • Lombok Flycatcher (Cyornis oscillans): A localised species found in the montane forests of Rinjani.
  • Rufous-backed Fantail: A lively and conspicuous bird of the forest understorey, often seen along the Senaru trail.
  • Subalpine Warbler and various sunbirds: Found at higher elevations near the crater rim.
  • Brahminy Kite and Crested Serpent Eagle: Raptors that soar above the forest canopy and savanna zones.

Reptiles and Amphibians

The park supports a range of lizards, geckos, and skinks. The blue-tongued skink and various agamid lizards are sometimes seen sunning on rocks along the trail. Frogs are active in the wet season around streams and moist forest areas. Keep an eye on the trail surface — small reptiles can be well camouflaged.

Flora: From Jungle to Alpine

The vegetation on Rinjani changes dramatically with altitude, creating distinct ecological zones:

  1. Tropical rainforest (below 1,500 m): Dense canopy, ferns, mosses, and rattans. Rich with epiphytes and orchids, including several endemic species.
  2. Montane forest (1,500–2,000 m): Casuarina and oak dominate, with the forest becoming more open and misty.
  3. Subalpine scrub (above 2,500 m): Edelweiss (Anaphalis javanica) — known locally as bunga abadi (immortal flower) — carpets open hillsides. Do not pick it; it is protected.
  4. Volcanic rock zone (above 3,000 m): Sparse mosses and lichens on bare volcanic scree approaching the summit.

Wildlife Watching Tips

  • Start walking early in the morning — wildlife activity peaks at dawn.
  • Move quietly and speak softly on the trail.
  • Carry binoculars for birdwatching from the crater rim and savanna sections.
  • Never feed wildlife — it's harmful and prohibited in the national park.
  • Report any unusual sightings to your guide or the park office; citizen data helps conservation efforts.