The bar-headed goose (Anser indicus) is a pale grey goose with two black bars across its white head that breeds on high lakes in Central Asia and crosses the Himalaya every winter to reach wetlands and farmland in India. It is famous among ornithologists as one of the highest-flying birds in the world, able to cross mountain passes where the air holds only a fraction of the oxygen found at sea level.
The bar-headed goose arrives in India from about October and leaves by March or April, and a small number also breed in Ladakh. This explainer covers how to identify the bird, how and why it flies over the Himalaya, where it winters in India, what it eats, how it breeds and what threatens it, in plain language for general readers.
| Quick Facts: Bar-headed Goose | |
|---|---|
| Common name | Bar-headed goose (Hindi: often called raj hans) |
| Scientific name | Anser indicus |
| Family | Anatidae (ducks, geese and swans) |
| Size | About 70-76 cm long, with a wingspan of roughly 140-160 cm; weight around 2-3 kg |
| Range and habitat in India | Winter visitor to lakes, rivers, reservoirs and farmland across northern, central and eastern India; small breeding population on high lakes in Ladakh |
| Diet | Grasses, sedges, sprouting grain such as wheat, barley and rice, and aquatic plants; grazes mostly at night and early morning |
| Breeding and migration | Breeds on high-altitude lakes of the Tibetan Plateau and Central Asia in summer; migrates south over the Himalaya to winter in the Indian subcontinent |
| Conservation status | Least Concern on the IUCN Red List; protected under India’s Wildlife (Protection) Act, 1972 |
Key Takeaways
- The bar-headed goose (Anser indicus) is a pale grey goose about 70-76 cm long, recognised by two black bars on its white head and its yellow-orange bill and legs.
- The bar-headed goose breeds on high-altitude lakes in Central Asia and winters in the Indian subcontinent, which forces it to cross the Himalaya twice every year.
- The bar-headed goose is documented flying at heights of several thousand metres, with tracking studies recording flights above roughly 6,000 metres, where oxygen is very scarce.
- The bar-headed goose has physical adaptations for thin air, including large lungs, blood that binds oxygen efficiently and a dense network of capillaries in its flight muscles.
- The bar-headed goose feeds mostly at night on grass, grain shoots and aquatic plants, and spends the day resting on water in tight flocks.
- The IUCN lists the bar-headed goose as Least Concern, although avian influenza, wetland loss and hunting are recognised threats.
What is the bar-headed goose?
The bar-headed goose is a medium-sized, grey, long-necked goose of the family Anatidae that breeds on the cold, high lakes of the Tibetan Plateau and Central Asia and spends the winter in South Asia. It belongs to the genus Anser, the group of “grey geese” that also includes the greylag goose.
The species is named for the two dark bars that run across the back of its white head. The scientific name Anser indicus means “Indian goose”, a reference to the winter home it reaches in the subcontinent. In India the bird has long been admired, and some writers link it to the swan-like bird called the hamsa or hans in Sanskrit and Indian art, although the identification of mythical birds with a particular species is a matter of interpretation.
The bar-headed goose is a social bird and travels in family groups and large flocks. It is one of the better-known winter visitors to Indian wetlands, and its V-shaped skeins calling overhead are a familiar sign of the cold season in northern India.
How can you identify a bar-headed goose?
A bar-headed goose can be identified by its white head crossed by two black bars, a pale grey body with a darker hind neck stripe, and an orange-yellow bill and legs. The rest of the body is soft grey, and the flanks have dark streaks that look like brush marks.
Field marks
- White face and crown with two black bars on the nape
- A dark brown stripe running down the back of the neck, bordered by white
- Pale grey back and breast, with a paler rump and white tail tip
- Yellow-orange bill with a small dark tip, and orange legs
- Males slightly larger than females; the sexes otherwise look alike
Young birds
Young bar-headed geese lack the head bars. They have a grey-brown crown and a dusky stripe through the eye, and a duller bill. The bars develop in the first year, and by the following winter the birds look like adults.
The bar-headed goose is easily separated from the greylag goose, which is browner and pinker-billed, and from domestic white geese seen in villages. In flight its pale grey upper wings and dark flight feathers show a clear contrast, and its calls are a deep, honking “aang-aang”.
How high can the bar-headed goose fly?
The bar-headed goose can fly at several thousand metres, and tracking studies using satellite tags and heart-rate loggers have recorded flights above roughly 6,000 metres during Himalayan crossings. Some older accounts claim sightings near the height of Mount Everest, but those higher figures are less well documented than the tracked flights.
Research on the bird, including studies that followed individuals fitted with GPS devices, has changed an older picture. Scientists once assumed that the geese stay in a high, thin-air band for long periods. Tracking suggests that the birds often follow the terrain, flying up valleys and over passes, and that many fly in the morning or day when winds help. Some individuals cross the range in a single day, while others make several stops. The effort remains great, because the air at 6,000 metres has only about half the oxygen pressure found at sea level, and at 8,000 metres it falls to around a third.
The table below summarises what is known about how the bird copes with these demands.
| Challenge | How the bar-headed goose copes |
|---|---|
| Thin air with little oxygen | Large lungs, deep breathing and blood that picks up oxygen efficiently |
| High energy demand of flapping flight | Dense capillaries and many mitochondria in flight muscles, which deliver oxygen to cells |
| Extreme cold | Thick down and feathers, plus body heat produced by flight itself |
| Strong mountain winds | Choice of calmer times of day and flight along valleys and passes |
| Long distance | Fat reserves built up on lake and farmland stopovers |
Why does the bar-headed goose migrate over the Himalaya?
The bar-headed goose migrates over the Himalaya because its breeding lakes in Tibet, Ladakh, Mongolia and Central Asia freeze in winter, while the wetlands and farms of the Indian plains stay ice-free and rich in food. The birds are therefore forced to cross the world’s highest mountain range twice a year to move between summer and winter homes.
Several reasons explain why the geese do not simply fly around the range. The route over the Himalaya is more direct for many populations, and the geese have the physical equipment to manage it. Some researchers have suggested that the species may have adapted gradually to high-altitude flight as the mountains rose over a very long period, though this remains a hypothesis rather than an established fact.
Migration happens mainly in autumn and spring. Birds begin arriving in northern India from about October, build up through November and December, and leave from February to April. Many travel at night or in early morning, and flocks often pause at lakes in the Tibetan region and the Himalayan foothills before the final push.
Where does the bar-headed goose winter in India?
The bar-headed goose winters on large lakes, rivers, reservoirs and surrounding farmland across northern, central and eastern India, with major concentrations in the Gangetic plain, Rajasthan, Punjab, Gujarat, Odisha, Assam and the Deccan. It prefers open water for resting, with fields of wheat, barley, rice or grass nearby for grazing.
Wetlands known for wintering bar-headed geese include:
- Keoladeo National Park in Rajasthan
- Harike Wetland on the Beas and Sutlej rivers in Punjab
- Chilika Lake in Odisha
- Sultanpur and other lakes in Haryana
- Kaziranga and other Brahmaputra floodplain wetlands in Assam
- Large reservoirs and river stretches in central and southern India
The bar-headed goose also winters in Nepal, Bangladesh, Pakistan and Myanmar. Within India, flock sizes vary by site and year, and numbers can change with water levels, disturbance and weather in the breeding area. Wintering geese are most commonly seen on river sandbars and the shores of broad lakes, where they gather in groups from a few dozen to several hundred birds.
What does the bar-headed goose eat?
The bar-headed goose eats mainly grasses, sedges and the green shoots of crops, together with grain, aquatic plants and some roots, and it grazes mostly after dark. It is a vegetarian bird that crops short vegetation with its bill in the manner of a small grazing animal.
In India the diet commonly includes:
- Young wheat and barley shoots in winter fields
- Sprouting or spilt rice, gram and other grain
- Grasses and sedges along lake shores
- Roots, tubers and shoots of aquatic plants
During the day the geese often rest on open water or sandbanks, where they are safe from ground predators. At dusk they fly out to feed in fields and shallow margins, then return before dawn. Feeding on sown fields can bring them into conflict with farmers, as flocks may trample and graze young crops. In their breeding areas, the geese feed mostly on grass, sedge and the shoots of aquatic vegetation around the lake edges.
How does the bar-headed goose breed?
The bar-headed goose breeds in the northern summer, from roughly May to July, on the shores and islets of high-altitude lakes in Tibet, the Qinghai region, Mongolia, Kazakhstan and, in India, parts of Ladakh. It nests on the ground in colonies, and sometimes uses cliffs or old nests of other birds.
The female lays about three to eight eggs, and she alone incubates them for around four weeks while the male stands guard nearby. Pairs are generally faithful, and the goslings are precocial, so they can walk, swim and feed soon after hatching. In clifftop nests, the goslings may jump down to the ground or water shortly after hatching, then follow their parents to the lake.
In India, Ladakh’s high lakes such as Tso Moriri, a Ramsar-designated wetland, and Tso Kar hold small breeding populations. These lakes lie above 4,000 metres, so breeding takes place in a brief season, and the goslings must grow flight feathers before the autumn freeze. Families therefore remain together on the migration, with the young flying their first long journey beside their parents.
Is the bar-headed goose endangered?
The bar-headed goose is not endangered, as the IUCN classifies it as Least Concern on the basis of a very large range and a large overall population. Even so, it faces several recognised threats along its flyway.
The main concerns are:
- Avian influenza: a major H5N1 outbreak at Qinghai Lake in China in 2005 killed thousands of wild birds, including many bar-headed geese, and the species is monitored for disease.
- Wetland loss: drainage, dams, pollution and disturbance affect staging lakes and wintering sites.
- Hunting and poaching: illegal hunting and capture still occur in parts of the range, even though the bird is protected in India under the Wildlife (Protection) Act, 1972.
- Infrastructure and climate: power lines, wind projects and changing lake levels on the Tibetan Plateau may add pressures.
Because the bar-headed goose uses wetlands in several countries, its protection depends on international cooperation. The Central Asian Flyway and wetland agreements such as the Ramsar Convention give a framework, and counts such as the annual Asian Waterbird Census help track winter numbers in India.
Why does the bar-headed goose matter?
The bar-headed goose matters because it is a flagship species for the health of high-altitude and lowland wetlands, a subject of important research on high-altitude physiology, and a living link between India and Central Asia. Its journey shows how a single species depends on lakes in several countries at once.
Scientists study the bird to understand how animals manage in low-oxygen conditions, which has lessons for medicine and for the biology of flight. Birdwatchers value it as a spectacular winter visitor, and wetland managers use its numbers as one sign of site condition. The bird also appears in the culture of South and Central Asia, where geese and swans have long stood for grace, purity and travel.
Practical advice for watching bar-headed geese includes visiting large wetlands in December or January, arriving at dawn or dusk when the flocks move, and keeping a respectful distance. Avoiding disturbance matters, because flushed geese waste energy that they need for the return migration.
Bottom Line
The bar-headed goose is a pale grey, two-barred goose that breeds on high Asian lakes and winters across India after a Himalayan crossing that few birds can match. It is secure as a species, but it needs healthy wetlands and disease monitoring on both sides of the mountains.
Frequently Asked Questions
What is a bar-headed goose?
A bar-headed goose is a pale grey goose, scientifically named Anser indicus, with a white head crossed by two black bars. It breeds on high lakes in Central Asia and Tibet and winters in the Indian subcontinent. It is known for crossing the Himalaya during migration.
How high does the bar-headed goose fly?
The bar-headed goose has been tracked flying above roughly 6,000 metres while crossing the Himalaya. Claims of flights close to the height of Everest are less well documented. Many birds follow valleys and passes rather than staying in the thinnest air for long.
When do bar-headed geese come to India?
Bar-headed geese begin arriving in India from about October, are most numerous from November to January, and leave between February and April. They come to escape the freezing of their breeding lakes in Tibet and Central Asia. They winter on lakes, rivers and farmland across northern, central and eastern India.
What does the bar-headed goose eat?
The bar-headed goose eats mainly grasses, sedges, sprouting grain such as wheat, barley and rice, and aquatic plants. It grazes mostly at night and early morning, then rests on water by day. It is a vegetarian bird and crops vegetation with its bill.
Does the bar-headed goose breed in India?
The bar-headed goose breeds in India only in small numbers, mainly on high-altitude lakes in Ladakh such as Tso Moriri and Tso Kar. Most of the world’s population breeds on the Tibetan Plateau and in Central Asia. Breeding in Ladakh occurs in the short summer, from about May to July.
Is the bar-headed goose protected in India?
The bar-headed goose is protected in India under the Wildlife (Protection) Act, 1972, which prohibits hunting and capture. The IUCN lists it as Least Concern globally. Wetland loss, hunting and avian influenza remain concerns along its migration route.
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