Tarai Wetlands Birding Directory: Where to See Migratory Waterbirds in Nepal

Nepal's southern lowland plain, the Tarai (also spelled Terai), holds most of the country's open water: shallow lakes, ponds, reservoirs, marshes and the slow river bends known as oxbow lakes. These wetlands sit on the Central Asian Flyway, a major migration corridor, so from about November to February they fill with waterfowl, waders, raptors and other birds that breed in Siberia, Mongolia, Tibet and the Central Asian steppe and move south to escape the northern winter. This is why searches for birdwatching in Nepal, best place to see birds in Nepal and koshi tappu birds peak in the cold months.

Nepal is remarkably rich for its size: about 875 bird species were assessed in the 2016 National Red List (roughly 8 percent of the world's known birds), and Bird Conservation Nepal (the national BirdLife International partner) recognises 27 Important Bird and Biodiversity Areas (IBAs). A large share of Nepal's wetland and grassland specialists and its globally threatened birds are concentrated in the Tarai. Ten Nepali wetlands are also listed under the Ramsar Convention on Wetlands of International Importance, covering roughly 60,561 hectares.

Four Tarai Ramsar sites stand out as winter waterbird destinations and anchor this directory: Koshi Tappu in the east, Beeshazar and Associated Lakes in the inner Tarai of Chitwan, Jagadishpur Reservoir in the Lumbini plains, and the Ghodaghodi Lake complex in the far west. Together they range from a genuine oxbow-and-river reserve to a man-made irrigation reservoir and a mosaic of natural lowland lakes, giving very different birding in a single winter itinerary.

Koshi Tappu Wildlife Reserve, on the floodplain of the Koshi (Sapta Koshi) River in Sunsari, Saptari and Udayapur districts of Koshi Province, is Nepal's flagship wetland for birds. It was established in 1976 (BS 2033) and, on 17 December 1987, became Nepal's first Ramsar site. The reserve covers about 176 square kilometres of low, flat terrain (roughly 75-81 metres above sea level) made up of grasslands, marshes, mudflats, reed beds and braided river channels between the Koshi embankments.

The bird list is exceptional: more than 485 species have been recorded here, over half of all birds known from Nepal, and higher counts have been reported by some surveys. In winter the sandbars and open water carry large flocks of bar-headed goose, ruddy shelduck (Brahminy duck), northern pintail and other ducks, along with storks, ibises, gulls, terns and shorebirds. Raptors are a highlight, including the resident Pallas's fish eagle and passage steppe and imperial eagles. Grassland and marsh specialists such as swamp francolin, watercock, Bengal florican and the rufous-vented grass babbler add to its reputation.

The reserve is managed by the Department of National Parks and Wildlife Conservation (DNPWC), and the National Trust for Nature Conservation (NTNC) runs the Koshi Conservation Center near the Kusaha entrance. Beyond birds, Koshi Tappu protects Nepal's last herd of wild water buffalo (arna) and Ganges river dolphins are occasionally seen in the Koshi. Boat trips on the river and walks along the eastern embankment are the classic ways to bird the site.

The Ghodaghodi Lake complex (Ghodaghodi Tal) lies in Kailali district of Sudurpashchim Province, in the low Siwalik (Churia) foothills at about 205 metres elevation. Designated a Ramsar site on 13 August 2003, it covers roughly 2,563 hectares and is not a single lake but a network of associated lakes, oxbow bends, marshes and ponds surrounded by natural sal and mixed forest. In March 2022 the wider area was declared Nepal's first bird sanctuary, a milestone for community-based wetland conservation.

The complex is a strong draw for searches on ghodaghodi lake birds because it combines forest and water species in one place. Local tourism figures cite well over 300 bird species, native and migratory, and the site is important for globally threatened birds including the lesser adjutant stork and the great hornbill, plus wintering ducks such as the cotton pygmy goose and lesser whistling duck. Marshes fringed with lotus and floating vegetation make it particularly photogenic in winter light.

Ghodaghodi is unusually easy to reach for a wetland of this quality: the East-West (Mahendra) Highway runs close to the main lake between Dhangadhi/Attariya and Lamki, so it is a practical stop on a far-western road trip. The surrounding forest corridor links the plains to the Siwaliks and supports mugger crocodile, otter and, occasionally, larger mammals moving through.

Beeshazar and Associated Lakes (Beeshazari Tal) is a classic oxbow-lake system in the buffer zone of Chitwan National Park in the inner Tarai, Chitwan district, Bagmati Province, at about 286 metres. Designated a Ramsar site on 13 August 2003 and covering roughly 3,200 hectares, its name literally means 'twenty thousand lakes' after its many small water bodies. About 273 bird species have been recorded, and the forested wetlands are especially good for storks, ibises, fishing eagles and large numbers of lesser whistling duck, while the surrounding forest holds Chitwan's rhinos, tigers and gharials. It is an easy add-on to any Chitwan or Sauraha visit.

Jagadishpur Reservoir, in Kapilvastu district of Lumbini Province, is Nepal's largest man-made reservoir, built in the early 1970s on the Banganga River for irrigation and designated a Ramsar site (site no. 1315) on 13 August 2003. Its open water, roughly 157 hectares within a listed area of about 225 hectares, is a magnet for wintering waterfowl: large congregations of common coot and northern pintail gather here, and tens of thousands of birds are reported in a good season. Studies have logged well over 150 species at the reservoir.

Crucially for the Lumbini plains, Jagadishpur and the surrounding farmland sit within the range of the sarus crane, and the site was declared a bird sanctuary by Lumbini Province in 2022. Together, Beeshazar and Jagadishpur show the two faces of Tarai wetland birding: a natural forested oxbow reserve and an irrigation reservoir that has become one of central Nepal's best duck and crane areas.

Use the table below to plan a winter circuit. All four sites are Ramsar wetlands, all peak for waterbirds in the cold months, and all are reachable by road from a nearby town or airport. Pair them with grassland and forest birding in the adjoining reserves for the fullest species list.

The Tarai wetlands are where Nepal's most sought-after waterbirds and marsh species can realistically be found. The sarus crane (Grus antigone antigone), the world's tallest flying bird and classed as Vulnerable by the IUCN, is the star of the Lumbini plains. Nepal's population was estimated at around 690 birds as of 2023, with more than 80 percent concentrated in Rupandehi, Kapilvastu and Nawalparasi West; Lumbini has adopted it as its official city bird. Anyone searching for sarus crane in Nepal should focus on the farmland and wetlands around Jagadishpur and Lumbini.

Other flagship and globally threatened species of these wetlands include the Bengal florican and swamp francolin in Koshi Tappu's grasslands, the lesser adjutant stork across all four sites, the great hornbill at Ghodaghodi, and Pallas's fish eagle over the larger lakes. Winter also brings spectacular flocks of bar-headed goose, ruddy shelduck, northern pintail, common coot, and a range of waders, gulls and terns, while white-rumped and other vultures may be seen over nearby farmland and forest edge.

Nepal has recorded more than 30 globally threatened bird species, and a disproportionate number depend on exactly these lowland wetlands and wet grasslands. That is why maintaining water levels, controlling invasive plants such as water hyacinth, and limiting disturbance in the Ramsar sites matters as much for birds as for the fisheries and irrigation the wetlands also provide.

Time your visit for the dry winter, roughly mid-November to late February, when migrants are present, water is clear and mornings are calm; December and January are usually the richest. Early morning and late afternoon give the best light and activity. The pre-monsoon months add breeding and resident species but far fewer waterfowl, and the summer monsoon (June-September) is generally poor for open-water birding.

Getting there is straightforward by Nepali standards. For Koshi Tappu, fly or drive to Biratnagar and continue to the Kusaha reserve gate; the NTNC Koshi Conservation Center is a useful first stop. Ghodaghodi is a roadside stop on the East-West Highway in Kailali. Beeshazar is a short trip from Bharatpur or Sauraha in Chitwan, and Jagadishpur is reached from Bhairahawa or Lumbini through Kapilvastu. Entry to the two reserve-based sites (Koshi Tappu and Chitwan's buffer zone) requires the standard national-park/reserve permits; the open lake areas at Ghodaghodi and Jagadishpur are freely accessible but benefit from a local guide.

Bird responsibly: keep to tracks and embankments, avoid flushing roosting flocks, do not play excessive call playback, and hire local guides and boatmen, which supports the communities that protect these wetlands. Bring binoculars, a field guide or app, sun and mosquito protection, and a scope if you can, as much of the action is on distant sandbars and open water.