Lambusango

Lambusango is a wildlife sanctuary (suaka margasatwa) on Buton Island in Southeast Sulawesi province, Indonesia, covering approximately 285 square kilometres (about 28,510 hectares) and lying about 40 kilometres from the city of Baubau. ^[1] Established in 1982 under Ministerial Decree No. 639/Kpts/Um/9/82 and managed by the Natural Resources Conservation Agency (BKSDA Sultra) within the Ministry of Environment and Forestry, Lambusango is renowned among conservationists as a stronghold for Sulawesi's endemic fauna. Forming part of the Lambusango forest complex within the Wallacea region, the sanctuary protects extensive lowland tropical forest that harbours anoa, tarsiers, macaques, and a rich endemic avifauna, making it a focus for biodiversity research.

Lambusango is celebrated for its endemic Wallacean wildlife and has been a site of long-term biodiversity research. Its forests support the lowland anoa (Bubalus depressicornis), a critically endangered endemic forest buffalo of which around 10% of the global population is estimated to occur on Buton, the Buton tarsier (Tarsius sp., a likely distinct species endemic to the island), macaques, and the bear cuscus. ^{[1] [2]} Avifaunal surveys recorded 79 bird species including 37 regional endemics, among them hornbills, kingfishers, and numerous restricted-range species. ^[3] Reptiles and amphibians add further to the diversity. The relatively intact lowland forest and varied terrain make Lambusango one of the most important refuges for these endemic and frequently threatened animals on Buton Island.

The sanctuary is covered largely by lowland and hill tropical rainforest, with tall canopy trees, dense undergrowth, climbers, and epiphytes characteristic of Sulawesi's wet forests, interspersed with karst and limestone formations that support specialised vegetation. ^[1] The forest structure includes valuable hardwoods and a diverse mix of tree species that provide food and habitat for endemic wildlife. Limestone substrates and varied topography create a mosaic of microhabitats. This vegetation underpins the sanctuary's high biodiversity and offers the fruiting trees and dense cover on which anoa, cuscus, tarsiers, and forest birds depend.

Lambusango lies within the geologically complex landscape of Buton Island, which is built on uplifted sedimentary and limestone formations shaped by tectonic activity at the convergence of the Australian and Asian plates. ^[1] Karst hills, limestone outcrops, caves, and rugged terrain are characteristic of the area, contributing to varied drainage and soil conditions. Buton is also globally notable for its natural-asphalt deposits within its sedimentary strata. The interplay of limestone geology and forest cover creates the distinctive habitats and microclimates that support the sanctuary's endemic fauna.

Lambusango has a warm, humid tropical climate with rainfall distributed across the year and modulated by the monsoon, producing wetter and somewhat drier seasons rather than a severe dry period. The northwest monsoon typically brings the heaviest rains, while the southeast monsoon is comparatively drier, though humidity remains high. Lowland temperatures stay warm year-round, moderated by the island's maritime setting. This consistently moist tropical regime sustains the dense rainforest and the high biological productivity that characterise the sanctuary.

Buton Island carries a rich heritage centred on the historic Sultanate of Buton, with its fortified capital at Baubau, and a culture rooted in seafaring, trade, and agriculture. ^[1] Communities living around the Lambusango forest practise farming, gathering of forest products, and small-scale resource use, and they have featured in community-based conservation and research initiatives in the area. The island's history of trade, including its later natural-asphalt industry, has shaped land use and settlement. Local people remain closely connected to the forest landscape that surrounds the sanctuary.

Lambusango was designated a wildlife sanctuary in 1982 under Ministerial Decree No. 639/Kpts/Um/9/82 to protect the endemic-rich lowland forests of central Buton Island. ^[1] Administered by BKSDA Sultra within Indonesia's conservation system, it has long attracted scientific attention, including biodiversity surveys and research projects focused on its anoa, tarsiers, and macaques. As a suaka margasatwa, its primary aim is the protection of fauna and habitat. Together with the North Buton sanctuary, Lambusango anchors a network of protected forests conserving the globally significant Wallacean biodiversity of Buton.

Lambusango is best known as a destination for wildlife research and ecotourism focused on Sulawesi endemics rather than for developed recreational infrastructure. Its draw lies in dense rainforest, karst landscapes, and the chance to encounter anoa, tarsiers, macaques, cuscus, and endemic birds, making it appealing to naturalists, researchers, and adventurous visitors. Buton Island more broadly offers cultural attractions such as the Baubau fortress and coastal scenery. Within the sanctuary, activity centres on guided wildlife observation and forest exploration rather than formal trail networks or built attractions.

Lambusango lies roughly 40 kilometres from Baubau, the main city on Buton, which is accessible by ferry and air from Kendari and other Sulawesi centres. Visitor facilities are limited, though the area's research history means local guides and community contacts may be available. As a wildlife sanctuary, access typically requires coordination with the managing BKSDA office and possibly permits. Travellers usually base themselves in Baubau or nearby villages for accommodation and transport, and should prepare for remote forest conditions, humidity, and limited infrastructure.

Lambusango protects a critically important block of endemic-rich forest, serving as a stronghold for anoa, tarsiers, macaques, and other threatened Wallacean species. Conservation pressures in the region include illegal logging, forest encroachment, hunting, and rattan and other resource extraction. ^[1] The sanctuary has been a focus of community-based conservation and long-term monitoring efforts aimed at reducing these threats. Managed by BKSDA Sultra, Lambusango's long-term sustainability depends on continued protection, scientific monitoring, and partnerships with surrounding communities to maintain habitat integrity and endemic wildlife populations.