IWN Report — Tuesday, 3 June 2026
Two items from the past three weeks that deserve attention — one a rare conservation milestone, the other a notable silence.
A gibbon crosses a bridge — and it matters more than it sounds
On 15 May 2026, Union Environment Minister Bhupender Yadav shared documentation of a male Western Hoolock Gibbon crossing a specially designed canopy rope bridge installed over the Lumding–Dibrugarh railway line inside the Hoollongapar Gibbon Sanctuary in Jorhat district, Assam. According to the Wildlife Institute of India, this is the first documented instance anywhere in the world of a gibbon using a canopy crossing constructed over a railway line.
The context matters. The Hoollongapar Gibbon Sanctuary is the only protected area in India named after a primate species. It covers approximately 21 sq km in Jorhat district and holds around 125 individuals of the Western Hoolock Gibbon — India’s only ape species, listed as Endangered on the IUCN Red List. The sanctuary has been bisected by the Lumding–Dibrugarh railway line since the late 19th century. For well over a hundred years, that 1.65-km track through the sanctuary’s core has divided the gibbon population, restricting movement between the forest’s two compartments and limiting natural breeding and dispersal.
The canopy bridges — rope structures with safety nets, designed by WII in collaboration with the Assam Forest Department and the Guwahati Mountaineering Institute — were installed between February and March 2026 as mitigation measures linked to the electrification of the existing single-track line. The Northeast Frontier Railway funded the installation. The bridges are designed to allow lianas and creepers to grow along their structure over time, gradually naturalising their appearance within the forest canopy.
The 15 May crossing is the first confirmed use. It is worth noting the distinction from an earlier canopy connectivity milestone at the same sanctuary: in 2019, a natural canopy bridge formed after a 13-year plantation effort by conservation organisation Aaranyak was documented in use by gibbons and capped langurs. That was a natural crossing over the same track. The May 2026 crossing is specifically the first documented use of an artificial structure over a railway line — a meaningful technical and conservation distinction.
The previous documented instances of gibbons using an artificial canopy crossing over any infrastructure: in Hainan, China, where a Hainan gibbon family began using a mountaineering rope bridge over a natural landslide gap in 2015, first crossing after 176 days, lar gibbons in Thailand used rope bridges to cross a road, and Müller’s gibbon (Hylobates muelleri) used artificial canopy bridges in Sabah, Malaysia to cross fragmented forests. The Hoollongapar crossing is the first such instance over a railway line.
Wildlife researchers and forest officials have welcomed the development while cautioning that long-term survival of the species requires broader ecological interventions — forest connectivity restoration, careful infrastructure planning on future railway projects in the Northeast, and expansion of reforested canopy corridors linking isolated habitat patches beyond the sanctuary boundary.
Sources: East Mojo (15 May 2026) · Assam Tribune · Wildlife Institute of India · Deccan Herald (natural canopy bridge, 2019) · Scientific Reports, 2020 (Hainan gibbon canopy bridge study)
Twenty-two days later: Kuno’s post-mortem is still not public
On the morning of 12 May 2026, the four one-month-old cubs of female cheetah KGP12 were found dead near their den site in the Sheopur Territorial Division of Kuno National Park. The cubs, born on 11 April 2026 — the first wild-born litter of African cheetahs on Indian soil — had last been observed alive on the evening of 11 May. Their bodies were found partially eaten. The Cheetah Project Field Director’s official release stated prima facie that the incident appeared to be predation by another animal, and that further details would be confirmed after post-mortem examination and detailed investigation.
As of 3 June 2026 — twenty-two days later — no post-mortem findings have been made public.
The Kuno National Park Field Director, Uttam Kumar Sharma, told The Wire at the time that a leopard attack was the likely cause — leopards are well-established predators of cheetah cubs in Africa, and their presence at Kuno had been cited by wildlife scientists as a potential long-term challenge to the reintroduction programme before it began. India’s cheetah population currently stands at 53, with 50 at Kuno (33 Indian-born) and three at Gandhi Sagar Sanctuary.
The Cheetah Project has a documented pattern of delayed mortality reporting. In earlier incidents at Kuno, post-mortem results and cause-of-death confirmations have taken anywhere from days to several weeks to be released publicly. In the case of the CDV deaths at Kanha in May 2026, by contrast, laboratory confirmation was released within days of the veterinary investigation being completed.
The absence of a formal post-mortem finding 22 days after the discovery is not, in itself, evidence of anything other than administrative delay. But it is a pattern that conservation researchers and wildlife journalists have flagged repeatedly in the context of the Cheetah Project, where the pace of public information has not always matched the pace of events on the ground. IWN will publish the findings as and when they are officially confirmed.
Sources: The Wire · ThePrint · ETV Bharat · Indian Masterminds · Cheetah Project Field Director press release, 12 May 2026