Orangutans Observed More & More Walking Along Logging Roads, Study Finds — Deforestation & Habitat Loss Implicated

Bornean orangutans are utilizing logging roads for travel on a greater and greater degree, based on new research. The reason for the “new” behavior of course being the increasing levels of deforestation and habitat loss in the region.

The findings of the research are something of a surprise to many researchers in the field, because while orangutans have long been known to make regular trips across the forest floor, the use of logging roads is a novel behavior (as compared to previous research anyways).

Orangutan wwf

The new findings are the result of research done in and around Wehea Forest — a 38,000 hectare mostly undisturbed rainforest in East Kalimantan, surrounded by logging operations. The researchers there spent 2.5 years in the area tracking/studying orangutans and clouded leopards.

A press release from the Simon Frasier University provides more:

Researcher Brent Loken’s latest discovery helps to reveal that orangutans may be trying to adapt to the rapid and unprecedented loss of their Borneo habitat, which is increasingly being eroded by timber plantations, agro-forestry and mines.

Researchers installed motion-triggered cameras in three regions of the Wehea Forest — one ancient and untouched, one previously logged and recovering, and one region adjacent to Wehea Forest that is now being logged. Daytime photographs of orangutan movements revealed that the apes frequently hike through pristine and regenerating forests, cleared areas, and even along deserted logging roads.


“These findings indicate these apes’ terrestriality may be a regular strategy employed almost equally by males and females,” stated Loken, who co-founded the NGO Integrated Conservation (ICON), after witnessing Borneo’s extreme deforestation and habitat loss. “We knew that large males tended to walk the ground. However, we found that males and females, even females with babies, were recorded almost equally walking on logging roads, trails and ridges.”

Given the extreme levels of deforestation, habitat loss, and logging, in the area — there really isn’t much of a choice though is there?

The researchers noted this, stating: “We must be careful not to reinforce the notion that orangutans can survive in any human-altered landscape. They still need trees and lots of them, and the protection of Borneo’s remaining forests should continue to be of the highest priority for Indonesia and the rest of the world.”

With industrial and economic growth in the region looking likely to continue into the foreseeable future, though, is such protection truly a possibility?

On a related note, those interested in seeing what the video obtained by camera traps such as those used in this study look like should see this article:

Giant Forest Hogs, Baboons, Agile Mangbeys, Crested Guinea Fowls, & Aardvarks (Camera Trap Footage From Bili Forest)

Image Credit: WWF









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