Manupeu Tanah Daru

Manupeu Tanah Daru National Park is a protected forest area located on the island of Sumba in East Nusa Tenggara province, Indonesia. The park covers approximately 87,984 hectares and encompasses two former nature reserves — Manupeu and Tanah Daru — which were merged and upgraded to national park status in 1998. The park protects some of the last significant tracts of monsoon forest on Sumba, an island known for its seasonally dry climate and culturally distinctive Sumbanese people. The park is internationally recognized as a critical habitat for endemic bird species, particularly the critically endangered Sumba cockatoo, making it an important destination for ornithological research and birdwatching tourism. The landscape features dramatic savanna grasslands, monsoon forests, limestone hills, and river valleys.

Manupeu Tanah Daru is among the most important bird areas in Indonesia, with over 160 recorded species including numerous Sumba Island endemics. The critically endangered Sumba cockatoo, also known as the yellow-crested cockatoo subspecies abbotti, has one of its last significant strongholds in this park. The Sumba hornbill, a magnificent endemic species with a large casque, inhabits the monsoon forest. Other Sumba endemics include the Sumba boobook owl, Sumba green pigeon, and Sumba flycatcher. Timor deer are abundant in the park and represent an important prey species. Wild boar and the small Sunda deer are also present. Various monitor lizards, including the Water Monitor, patrol river margins. The park's avian diversity reflects Sumba's position in the Wallacean transition zone between Asian and Australasian biogeographic regions.

The park's vegetation is dominated by semi-deciduous monsoon forest adapted to the strongly seasonal rainfall regime of Sumba. During the dry season, many trees shed their leaves, creating open forest conditions distinct from the year-round green of equatorial rainforests. Tree species include various Dipterocarpus species adapted to seasonally dry conditions, along with tamarind, teak relatives, and native figs. The limestone terrain in parts of the park supports specialized calcareous vegetation. Savanna grasslands, including Imperata cylindrica grasslands maintained by seasonal burning, occur extensively within the park. Gallery forest follows river courses, providing year-round shade and moisture for wildlife. Bamboo thickets and rattan groves are present in disturbed areas. The dry forest flora of Sumba has significant species in common with eastern Indonesian islands including Timor and Flores.

Sumba Island has a complex geological history distinct from the volcanic islands of the main Indonesian arc. It is primarily composed of Tertiary limestone and sedimentary rocks, representing ancient marine deposits uplifted by tectonic activity. Unlike Lombok, Flores, and other islands in the region, Sumba lacks active volcanoes. The island's geology produces a karst landscape in some areas, with limestone hills, sinkholes, and cave systems. River systems have carved valleys through the sedimentary terrain. The soils derived from limestone and ancient sedimentary rocks are generally less fertile than volcanic soils, contributing to the island's characteristic dry savanna character. Sumba's position relative to tectonic plates has resulted in its relative geological stability compared to the volcanic islands of the Sunda arc.

Sumba has one of the most strongly seasonal climates of any Indonesian island, with a pronounced dry season that typically extends from May to October and a wet season from November to April. Annual rainfall in the park area ranges from approximately 1,000 to 2,000 millimeters, concentrated in the wet season months. The dry season is very pronounced, with months receiving minimal rainfall and strong, dry southeasterly trade winds from Australia. Temperatures are warm year-round, typically between 22 and 35 degrees Celsius. The extreme seasonality shapes the deciduous character of the forest and determines seasonal wildlife behavior patterns. Birdwatching is generally best during the wet season when many species are breeding, though the dry season offers better visibility through the deciduous forest.

Sumba Island has been inhabited for thousands of years by the Sumbanese people, who developed a distinctive culture known for its animist spiritual traditions, megalithic tomb construction, and elaborate textile weaving. The island was historically known to regional traders for its sandalwood, horses, and slaves. The Sumbanese maintained largely autonomous kingdoms and clans until Dutch colonial administration was established in the early twentieth century. Traditional practices including the Pasola ritual — a ceremonial horseback spear-throwing ceremony — continue to be observed and are closely connected to the agricultural calendar and spiritual beliefs. The forests of the interior provided resources for traditional communities, including timber, medicinal plants, and wildlife. Horse-keeping culture is deeply embedded in Sumbanese identity.

The Manupeu and Tanah Daru areas were separately established as nature reserves in 1982, protecting the remaining monsoon forest habitats of Sumba. Recognition of the exceptional endemic bird diversity of Sumba drove conservation interest in the island. The two reserves were merged and elevated to national park status in 1998, creating a more cohesive management unit. International conservation organizations including BirdLife International have highlighted Sumba as a globally significant endemic bird area. Conservation surveys in the 1990s and 2000s documented the precarious status of the Sumba cockatoo and other endemic species, prompting increased attention to habitat protection. The park management authority works with limited resources in a remote and logistically challenging context.

Manupeu Tanah Daru is primarily visited by birdwatchers seeking Sumba's endemic avifauna. The Tanggedu waterfall, located near the Manupeu section of the park, is a scenic attraction accessible by foot trail through monsoon forest. Forest trails in both the Manupeu and Tanah Daru sections offer birdwatching opportunities, with early morning hours providing the best chance of encountering the Sumba cockatoo and hornbill. Guided birdwatching tours can be arranged through local operators in Waingapu, the main town of eastern Sumba. Cultural experiences in surrounding villages offer insight into traditional Sumbanese life, megalithic tombs, and ikat textile weaving. The dramatic savanna and limestone landscape provides scenic photography opportunities.

Access to Manupeu Tanah Daru is from Waingapu or Waikabubak, the main towns of eastern and western Sumba respectively. Sumba is served by Tambolaka Airport near Waikabubak and Umbu Mehang Kunda Airport in Waingapu, with connections to Bali and other Indonesian cities. Roads to the park are generally unpaved and challenging, particularly in the wet season, requiring four-wheel drive vehicles. Accommodation in the park is limited to very basic facilities, with guesthouses available in nearby towns. Hiring local guides is essential for navigation and wildlife spotting. Park permits must be obtained from the park authority office. Tourism infrastructure is significantly less developed than in more visited Indonesian national parks, reflecting the remote location and low visitor numbers.

The Sumba cockatoo faces severe threats from illegal trapping for the bird trade, which has devastated populations across its historical range. Habitat loss from agricultural expansion, logging, and fire is a persistent threat to the park's monsoon forest. Traditional slash-and-burn agriculture on park margins continues to degrade forest habitats. Conservation programs specifically targeting the Sumba cockatoo have involved community education, anti-poaching patrols, and support for alternative livelihoods. The Sumba Hospitality Foundation, operating tourism lodges near the park, channels revenue to local communities and conservation programs. Limited park management resources and the remote location create enforcement challenges. Climate change may intensify drought conditions on Sumba, threatening the resilience of the monsoon forest ecosystem.