Tajuk hutan tropis Kalimantan
Keterangan Foto Tajuk hutan topri di kawasan PT Karya Lestari. © YKAN

Perspectives

Stories from the Forests of Kalimantan

Since ancient times, the forests of Kalimantan in Indonesia have been known worldwide for their rich biodiversity and their vital role in the global climate. But have you ever wondered about their current condition and what else lies there?

Read: Community’s Role in Preserving Turtles in Sabu Raijua

In January 2025, Yayasan Konservasi Alam Nusantara  (YKAN) conducted a journey into the interior forests of East Kalimantan with its partners, The Nature Conservancy (TNC) and Arhaus. The journey's experiences are recounted by author Matt Miller, who observed firsthand every step, every encounter, and every impression he gained of this rich tropical forest.

Intrigued? Here's the story:

Huliwa (Wehea Protected Forest) ThThe medicinal plant garden, renowned for its rich biodiversity, serves as a sanctuary for orangutans and other rare wildlife. © YKAN

As I step off the boat onto the boardwalk, my eyes immediately catch movement in the nearby trees. Flashes of fur, long tails swaying. In the dense tropical forest, it’s difficult to get a clear view. But as I scan deeper into the brush, a face suddenly appears right before me: a monkey.

Soon, others appear, occasionally stopping to give me an inquisitive look, but mainly gamboling through the trees, alternately playing and fighting.

I travel along the path, enjoying their antics, when my eye catches a slower movement in a forest clearing. A monitor lizard—4 feet in length—flicks its tongue as it heads toward some of the camp’s breakfast leftovers.

Camera Trap A wild pig-tailed macaque (Macaca nemestrina) was captured on a camera trap while exploring the forests of Kalimantan. © YKAN

Farther down, a large handmade sign emblazoned in block letters says: “Welcome to the Jungle.”

I’m in Kutai National Park in the province of East Kalimantan, located in the Indonesian portion of the island of Borneo—which is known as Kalimantan. A career nature and science writer, I’ve always dreamed of coming here, and I’m excited by the possibility of seeing an orangutan in its natural habitat. But I’m also here to learn firsthand what the future holds for orangutans and Bornean forests.

This opportunity is very good, because now I am traveling with YKAN and its partners. Arhaus, one of its partner, has made a significant financial commitment to YKAN in its efforts to support the Indonesian government, companies and communities to protect and sustainably manage the forests in Kalimantan. 

Borneo is the world’s third-largest island, and it is known for its exceptional biodiversity. This includes more than 15,000 plant species, well over 600 birds and more than 220 mammals. Over the past several decades, habitat has been lost to logging, infrastructure development, mining and agriculture. As a result, orangutan populations have declined precipitously. Still, Kalimantan holds roughly three-quarters of the world’s remaining orangutans, and East Kalimantan has some of the most significant tracts of forest remaining.

Inhabitants of the Tropical Forest Canopy The rhinoceros hornbill (Buceros rhinoceros) is an endemic bird that lives in the canopy of tropical forests and is one of the largest hornbill species in Asia. © Arif Rifqi/YKAN

I’m in East Kalimantan to see how community-led conservation efforts are protecting the forest and wildlife, including the iconic orangutans. To date, the effort is protecting orangutan corridors within more than 1.3 million acres of important habitat, and the community-led approach is a model for helping achieve the protection of millions more acres of Indonesian forest. National parks, community-protected areas and logging concessions, I’ll soon learn, all have a role to play.

Let's continue the journey, and find out more about what this region has to offer.