A critically endangered Sumatran orangutan has been filmed crossing a man-made canopy bridge for the first time, a conservation group announced Sunday, marking what researchers are calling a world first for the species.
The footage was captured on one of five hanging bridges built in 2024 in North Sumatra's Pakpak Bharat district by Indonesian conservation group Tangguh Hutan Khatulistiwa, working alongside UK-based charity Sumatra Orangutan Society and local authorities. The bridges were constructed after a road serving remote communities was expanded, cutting through rainforest and splitting a local orangutan population of around 350 individuals.
Other species had already been recorded using the bridges. Gibbons and long-tailed macaques were spotted crossing before any orangutan appeared on camera. The new footage changes that.
"These canopy bridges demonstrate that human development and wildlife don't have to be at odds," said Helen Buckland, chief executive of the Sumatra Orangutan Society. "Sometimes, the simplest solutions are the most effective."
Buckland called the crossing a "huge milestone for conservation." The road itself remains an important social and economic link for communities in the region, which is part of why the expansion was carried out. The challenge conservationists faced was finding a way to reconnect the fragmented forest without removing infrastructure that local people depend on.
Erwin Alamsyah Siregar, executive director at Tangguh Hutan Khatulistiwa, said habitat fragmentation was "one of the greatest challenges in contemporary conservation." He expressed hope that canopy bridges would become a "standard feature" of infrastructure planning across the region, not a one-off solution confined to this stretch of road.
The International Union for Conservation of Nature classifies Sumatran orangutans as critically endangered. The most recent count recorded just over 13,587 individuals. In the wild, orangutans exist only on Sumatra and the island of Borneo, which is shared between Indonesia, Malaysia, and Brunei. Their decline is driven primarily by habitat loss from deforestation, land clearance for agriculture, road construction, and illegal hunting.
The canopy bridge project represents one approach to a problem that conservationists have long struggled to solve: how to preserve wildlife corridors in landscapes increasingly shaped by human use. Whether the single crossing captured on camera signals that orangutans are beginning to use the bridges regularly, or whether it reflects a one-time event, remains to be seen. The cameras monitoring the bridges will continue recording.
