The Wondiboy Peninsula, also known as the Wondiwoi, Wandammen (spelled locally Wandamen), Wondama, or in old sources Mandamy^[2][3] is a mountainous peninsula in Wondama Bay Regency, Western New Guinea. It extends northwards from the Bird's Neck Isthmus into Cenderawasih Bay. The mountains run north and south along the spine of the peninsula, rising from the shore up to 2,250 metres elevation, and extending southwards into the Bird's Neck Isthmus.^[4] The eastern slope of the mountains is steeper than the western slope. Roon Island lies off the north end of the peninsula.

Quick Facts Pegunungan Wondiboy Nature Reserve, Location ...

Pegunungan Wondiboy Nature Reserve
Wondiboy Mountains Nature Reserve
IUCN category Ia (strict nature reserve)[1]
Location of the peninsula in West Papua Province Show map of West Papua (province) Location of the peninsula in Western New Guinea Show map of Western New Guinea
Location	Teluk Wondama Regency, West Papua, Indonesia
Coordinates	2°36′0″S 134°34′30″E
Area	795 km2 (307 sq mi)
Designation	Nature reserve
Governing body	Balai Besar Konservasi Sumber Daya Alam Papua Barat

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Lowland rain forest covers the lower slopes of the range, with montane rain forest at higher elevations. Lowland forests extend from sea level to approximately 1000 metres elevation. Lower montane forests are dominated by Castanopsis acuminatissima and species of laurels. Southern beech (Nothofagus spp.) is predominant in upper montane forests, and the trees are often covered in mosses and other epiphytes.^[5]

Most of the Peninsula is covered by Pegunungan Wondiboy Nature Reserve, which covers an area of 795 km² (307 sq mi).^[1]

The name Wandamen or Wondama comes from the Austronesian Wamesa language word Won meaning "people" and Dama meaning "come", so combined the word means, "the place where people come". Meanwhile Mandamy or Mandama comes from the Biak language with the same meaning.^[3]