Qualla: Northern Annamites rain forests

Northern Annamites rain forests: Introduction

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Rolf Müller (User:Rolfmueller), CC BY-SA 3.0. Fire is what keeps the pine forests here. On thin, rocky soils up to about 1,500 metres, Khasi pine grows twenty to thirty metres tall in open stands, and the burns that sweep through them regularly would appear to be the enemy of anything with bark. They are the opposite. Fire is what stops broadleaf trees from establishing a closed canopy and shading the pines out of existence. Stop the burning and the pine forest quietly disappears - not to an axe, but to shade. That inversion is a decent introduction to the Northern Annamites, a mountain range that rewards almost nobody's first assumption about it.

Image: Rolf Müller (User:Rolfmueller) | CC BY-SA 3.0

Northern Annamites rain forests: The Long Green Wall

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Every-leaf-that-trembles, CC BY-SA 4.0. The ecoregion, catalogued by WWF as IM0136, runs roughly 350 kilometres along the spine of the northern Annamite Mountains across central Laos and Vietnam, up to 150 kilometres wide, covering about 47,137 square kilometres in all. Around three-quarters of it is still forested - s...

Image: Every-leaf-that-trembles | CC BY-SA 4.0

Northern Annamites rain forests: Read the Forest by Altitude

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Rolf Müller (User:Rolfmueller), CC BY-SA 3.0. Between 800 and 1,200 metres, lower montane forest builds a dense two-tiered canopy fifteen to twenty-five metres up - myrtles, oaks, Castanopsis, Lithocarpus, laurels, with podocarp conifers mixed in. Orchids and other epiphytes crowd the branches, and many of those orchids grow...

Image: Rolf Müller (User:Rolfmueller) | CC BY-SA 3.0

Northern Annamites rain forests: What Lives in It

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Rolf Müller (User:Rolfmueller), CC BY-SA 3.0. More than 134 mammal species have been identified in the ecoregion, a striking number of them endemic or threatened. The critically endangered douc langur - a monkey, despite the name, and one of the most spectacularly coloured primates anywhere - lives here alongside the vulnera...

Image: Rolf Müller (User:Rolfmueller) | CC BY-SA 3.0

Northern Annamites rain forests: A Third on Paper

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Rolf Müller (User:Rolfmueller), CC BY-SA 3.0. Just over 33 percent of the ecoregion falls inside protected areas, and the network is genuinely substantial on the map. Pu Mat National Park in north-central Vietnam - the name means high slope - protects 911 square kilometres and has recorded 2,461 plant species. Nam Kading in ...

Image: Rolf Müller (User:Rolfmueller) | CC BY-SA 3.0

Northern Annamites rain forests: A Border That Stopped Mattering

Mon, 17 Aug 2026 00:00:00 GMT

Photo credit Rolf Müller (User:Rolfmueller), CC BY-SA 3.0. The most consequential recent change came in 2025, when Hin Nam No in east-central Laos was inscribed on the World Heritage List as an extension of Vietnam's Phong Nha-Ke Bang National Park. The two sit on opposite sides of an international frontier and on the same block of limes...

Image: Rolf Müller (User:Rolfmueller) | CC BY-SA 3.0