Antlers & Antelopes of India — Part 9. Read Part 8: The Hangul →
It lives nowhere else on earth except a 40 square kilometre raft of floating vegetation in the middle of a lake in Manipur. Its hooves have evolved to walk on ground that moves beneath them. Its name, in Meitei folklore, comes from the way it runs — turning its head back towards whoever is chasing it, as if to look them in the eye. And depending on which government survey you read, there are either 260 of them left, or 64.
The animal itself
The Sangai — known formally as the Manipur brow-antlered deer, or Eld’s deer (Rucervus eldii eldii) — is a medium-sized deer, smaller and more lightly built than the sambar or hangul covered earlier in this series. Adults stand around 0.9 metres at the shoulder, with a reddish-brown coat in summer that darkens to deep brown in winter, and pale spots that are visible on fawns and, faintly, on some adult coats.
Its most distinctive feature is its antlers. Unlike the branching, multi-tined racks of sambar or hangul, the Sangai’s antlers form a continuous curve: the brow tine sweeps forward and the main beam arcs back and up in a single bow-like shape, so that from the side the whole structure looks like a pair of long, graceful hooks rising from the forehead. The English name ‘brow-antlered deer’ refers to exactly this — the brow tine is as long as, or longer than, the main beam, which is unusual among deer.
The Sangai is one of three surviving subspecies of Eld’s deer, the other two being the thamin of Myanmar and the Siamese Eld’s deer of mainland Southeast Asia, both also threatened. The Manipur subspecies is the most isolated of the three, and the only one confined to a single protected area.
What gives the Sangai its local name, though, is neither its antlers nor its colouring. ‘Sangai’ is widely translated as ‘the animal that looks back at you’ — a reference to its habit, when startled and fleeing, of turning its head over its shoulder to watch its pursuer even as it runs. Older Manipuri accounts describe hunters who, having wounded a Sangai, found themselves unable to take the final shot once the deer turned to look at them. Whether or not that story is literally true, it has shaped how the Sangai is regarded in Manipur — less as a game animal than as a creature with an unsettling, almost human awareness of being watched.
A park that floats
The Sangai’s entire wild population lives in Keibul Lamjao National Park, on the southeastern edge of Loktak Lake in Manipur’s Bishnupur district. At 40 square kilometres, it is one of India’s smallest national parks — and the only one in the world that floats.
Most of the park’s area is made up of phumdis: thick mats of soil, decaying vegetation, and organic matter that have built up over decades into rafts dense enough to support the weight of grazing deer, but soft enough that a human foot sinks several inches with each step. The Sangai’s hooves have adapted accordingly — they are slightly more splayed and elongated than those of related deer, distributing weight across the spongy surface in a way that lets the animal move with surprising agility across ground that would not support a person walking normally.
Two-thirds to three-quarters of Keibul Lamjao is phumdi. The rest is slightly higher, firmer ground — locally called pat — where the deer retreat during the monsoon when the phumdis become waterlogged and unstable. The park sits within Loktak Lake itself, a Ramsar-designated wetland of international importance and the largest freshwater lake in northeastern India, which also supports fishing communities living on floating huts and a significant population of waterbirds.
The Sangai was declared extinct in 1951. Two years later, naturalist E.P. Gee rediscovered a small surviving population in the Keibul Lamjao area — by some accounts as few as six individuals were confirmed at the time. The area was declared a sanctuary in 1955 and upgraded to a national park in 1977, specifically to protect the species.
From fourteen to two hundred and sixty — and then to sixty-four?
The Sangai’s recovery from the brink of extinction is one of the more striking numbers in Indian conservation. The first aerial census, in 1975, counted just 14 animals. By 1995, the population had reportedly grown to around 155. The 2016 census — the figure most widely cited in government communications, tourism material, and international references — put the population at 260, more than an eighteen-fold increase from the 1975 low.
That 260 figure has continued to be repeated in official and promotional contexts through 2025 and into 2026, including around the announcement of this year’s census, conducted by the Manipur Forest Department in late February 2026.
But a separate body of research tells a different story. At a research seminar at the Wildlife Institute of India, researcher Mirza Ghazanfarullah Ghazi presented findings from a WII-led monitoring effort showing the mean estimated Sangai population at 91 in 2006, 76 in 2019, and just 64 by 2023 — a steady decline rather than the steady rise implied by the headline 260 figure. The presentation went further, estimating the species’ effective population size — a measure of genetic diversity, not raw headcount — at just 7.5, against a recommended minimum of 100 to avoid inbreeding depression and 1,000 for long-term viability.
The two figures are not simply a rounding difference. They appear to reflect different counting methods — direct sightings from fixed watch points (machans) across the park’s open phumdi areas, versus more intensive monitoring incorporating individual identification — applied to a population that is notoriously difficult to count in a floating, partly submerged habitat where animals move between dense reed cover and open phumdi depending on season and water level. Whichever figure is closer to the truth, both groups of researchers agree on the underlying concern: a population confined to 15–20 square kilometres of usable habitat within a single park, with nowhere else in the world to disperse to, is inherently vulnerable — and a population genetically as narrow as an effective size of 7.5 would be vulnerable even if the headcount were considerably higher than either estimate suggests.
The lake beneath the deer
The Sangai’s most serious long-term threat is not poaching, though that has historically been a factor, but the condition of the phumdis themselves — and that, in turn, is tied to the management of Loktak Lake as a whole.
The Ithai Barrage, built downstream of Loktak Lake in the 1980s as part of a hydroelectric project, altered the lake’s natural water-level fluctuations. Loktak’s phumdis had historically thinned, dried, and partially grounded during the dry season, then re-floated with the monsoon — a cycle that kept the floating mats healthy and renewed. With water levels held more constant by the barrage, phumdis in parts of the lake have become waterlogged and degraded, while in Keibul Lamjao itself, sections of phumdi have become too thin to support the deer reliably, pushing them into a smaller effective range than the park’s nominal 40 square kilometres would suggest.
Researchers have also noted a shift in the Sangai’s distribution within the park between 2017 and 2021, attributed to changes in phumdi thickness and dispersal — the deer moving northward as their preferred habitat shifted under them, in the most literal sense. Invasive and excessive vegetation growth on parts of the phumdi, encroachment pressure from fishing communities around the lake’s edges, and the basic ecological fact of a single population with no possibility of natural dispersal to found new groups elsewhere, complete the picture of a species whose recovery — on either set of numbers — remains fragile in a way that a simple population count does not fully capture.
The deer that carries a state’s name
Few of India’s deer carry the cultural weight that the Sangai does in Manipur. It is the state animal, its image appears on government emblems and institutional branding across the state, and Manipur’s largest annual tourism and cultural event — the Sangai Festival, held each November — is named for it. The festival, now running for over a decade, brings together craft, cuisine, sport, and performance from across Manipur’s communities, with the deer’s image as its central symbol.
That visibility cuts both ways. The Sangai’s near-mythical status in Manipuri culture has almost certainly helped sustain the political will behind Keibul Lamjao’s protection through decades in which the wider region has faced significant instability. But it has also meant that the population figure itself has become something of a public symbol — a number that is expected to tell a recovery story, in a state where the animal’s continued existence is a point of considerable pride. The gap between the figure most often repeated and the figure researchers monitoring the population most recently arrived at is, in that light, not just a technical disagreement between survey methods. It is a question about how honestly a conservation success story can be allowed to be revised once it has become a symbol.
What is not in dispute is that the Sangai survives only here, in a landscape unlike any other protected area in India — a national park you can only properly experience by boat, where the ground itself is alive, and where a deer that was declared extinct seventy-five years ago continues to exist in numbers that, on the most recent rigorous count, would fit inside a single large field.
The Sangai has come back from six known individuals to a population that — however large it currently is — remains one of the rarest deer populations on the planet, in one of the most unusual habitats any large mammal occupies anywhere. Whether the next census confirms 260, or something closer to 64, or something in between, the underlying task does not change: keeping the phumdis floating, keeping the lake’s water regime survivable for a deer that has nowhere else to go, and keeping faith with a population that Manipur has spent seventy years refusing to let disappear.