Jamursba Medi

Jamursba Medi is a Wildlife Sanctuary (Suaka Margasatwa) protecting a stretch of remote beach on the northern coast of the Bird's Head (Vogelkop) Peninsula in Southwest Papua province, Indonesia. Established in 1982 by Ministerial Decree No. 820/Kpts/Um/11/1982 and covering about 278 hectares (2.78 km²) of nesting beach and adjacent habitat, it lies on the Tambrauw coast roughly 40 km from Sausapor. ^[1] Jamursba Medi is globally significant as one of the largest nesting sites for the western Pacific leatherback sea turtle, the world's largest turtle. As a suaka margasatwa, the sanctuary is dedicated to protecting this critically important wildlife population and its nesting habitat.

Jamursba Medi is renowned as a globally important nesting beach for the western Pacific leatherback turtle (Dermochelys coriacea), the world's largest turtle and a critically endangered sub-population, with Jamursba Medi and neighbouring Wermon beaches together supporting around 75% of annual western Pacific leatherback nesting. ^[1] Other sea turtles, including green and hawksbill turtles, also use the area, and the adjacent forest and coast support New Guinea wildlife such as birds, monitor lizards, and crabs. The beach and its turtles form the ecological centerpiece of the sanctuary, supported by the surrounding coastal and forest habitats.

Behind the nesting beach lies coastal strand and lowland forest vegetation, including beach forest species, pandanus, casuarina, and tropical hardwoods that stabilize the shoreline and provide shade and structure to the coastal zone. The vegetation helps maintain the integrity of the nesting beach, influencing sand temperature and protecting against erosion. This natural coastal forest backdrop, typical of the remote northern Vogelkop coast, frames the leatherback nesting grounds and forms part of the habitat the sanctuary protects.

Jamursba Medi consists of long sand and gravel beaches along the northern coast of the Bird's Head Peninsula, backed by forested coastal terrain and rising hinterland. The beaches' sand composition and temperature are crucial for turtle nesting, influencing hatchling sex ratios and survival. The wider Tambrauw region is geologically rugged and tectonically active, part of the complex northern New Guinea plate-boundary zone, with the coastline shaped by the interplay of marine processes and the uplifted land that forms the peninsula's northern shore.

The sanctuary has a hot, humid tropical climate with warm temperatures throughout the year, generally in the upper 20s to low 30s Celsius, and high humidity. Rainfall is abundant and influenced by the monsoons, with the timing of seasons affecting both the leatherback nesting peaks and the accessibility of the remote coast. Beach sand temperatures, governed by climate and shade, play a key role in turtle reproduction, making the sanctuary's microclimate especially important for the success of leatherback nesting.

The Jamursba Medi coast lies within the customary lands of indigenous Papuan communities of the Tambrauw region, who have long lived along this remote shore and historically used turtle eggs as a food source. Traditional harvesting of eggs, alongside natural predation, once threatened the leatherback population, and engaging local communities has been central to conservation. Today, local people are increasingly involved as partners and rangers in protecting the turtles, blending customary connection to the coast with modern conservation roles.

Jamursba Medi was established as a Wildlife Sanctuary in 1982 by Ministerial Decree No. 820/Kpts/Um/11/1982 (Ministry of Agriculture, 10 November 1982) to protect its globally significant leatherback turtle nesting beaches from egg harvesting, predation, and disturbance. ^[1] Recognition of the site as one of the most important leatherback rookeries in the Pacific drove its protection and ongoing monitoring. Managed by the Papua Barat (West Papua) BKSDA, often in partnership with conservation organizations and local communities, the sanctuary has become a focus of long-term turtle research and nest-protection programs.

The defining attraction of Jamursba Medi is the leatherback turtles themselves, with the chance to witness massive females nesting on the beach and, in season, hatchlings emerging and making their way to the sea. The remote, wild coastline and surrounding forest add to the sense of pristine wilderness. Visits are tied to conservation and research activities rather than conventional tourism, and the experience centers on responsible observation of one of the planet's most remarkable and endangered marine reptiles.

Reaching Jamursba Medi is challenging, involving travel to the Tambrauw coast via Sorong or Manokwari and onward by road and boat to the remote shore about 40 km from Sausapor. Facilities are minimal, consisting mainly of ranger and research camps that support turtle monitoring rather than tourist amenities. Access is generally arranged through conservation programs or the West Papua BKSDA, and visitors should expect a rugged, expedition-style journey to this isolated stretch of coast.

Conservation at Jamursba Medi is of global importance for the survival of the western Pacific leatherback turtle, a critically endangered sub-population facing threats from egg harvesting, beach predation by pigs and dogs, erosion, bycatch at sea, and climate change effects on nesting beaches. ^[1] Protection efforts include nest monitoring, beach patrols, predator control, community engagement, and partnerships with international conservation programs. Sustaining this leatherback rookery requires long-term, coordinated action across nesting beaches and migratory routes, with local community stewardship at its heart.