Wildlife · Nepal
Birding at Koshi Tappu Wildlife Reserve
Birding Nepal's richest wetland — 480-plus species and huge winter waterbird flocks on the Koshi River floodplain.
Koshi Tappu is Nepal's premier birdwatching destination, a Ramsar-listed wetland on the floodplain of the Koshi River in the eastern Terai where more than 480 bird species have been recorded — the richest list in the country. For waterbirds and wetland specialists it is unmatched, especially in winter when migratory flocks arrive in their thousands. This birding-focused guide covers the key species, the best season and how to bird the reserve, and sits within the birdwatching in Nepal collection. For the wider reserve, its mammals and practicalities, see the full Koshi Tappu Wildlife Reserve profile.
Why it is Nepal's top birding site
Koshi Tappu's mosaic of marsh, oxbow lakes, mudflats, reed beds and grassland packs in habitats that hold birds found almost nowhere else in Nepal. Its position on the Koshi makes it a funnel for migratory waterbirds crossing the Himalaya, and its grasslands shelter scarce resident specialities. The sheer concentration of birds in a small, watery landscape is what brings birders back year after year.
Key birds to find
Waterbirds are the headline: a great range of ducks and geese, storks, ibises, egrets, herons, gulls, terns, waders and wetland raptors fill the channels and mudflats in winter. The reed beds and grassland hold the scarce swamp francolin and, in season, the endangered Bengal florican, while the river edges are good for kingfishers, pratincoles and bee-eaters. Rarities — vagrant ducks, gulls and waders — turn up most winters, which is part of the site's pull.
When to go
Winter (November to February) is the prime birding season, when migratory waterbirds gather in huge numbers and the cool, dry weather makes long days in the field comfortable. The monsoon (June to September) floods large areas, and the pre-monsoon months are hot and humid with far fewer birds, so most birders avoid them. Plan around the best time to visit Nepal seasons.
How to bird the reserve
Birding is done on foot along the river embankments and grassland edges, and by boat on the Koshi channels at dawn, when waterbirds are most active. Reach the reserve by flying to Biratnagar and driving a couple of hours, or by long-distance bus on the East–West Highway. Hire a licensed local bird guide at the headquarters; they know the seasonal hotspots, the calls and the week's rarities, and your fees support community conservation.
Combine with other sites
Pair Koshi Tappu's wetland birds with the mid-hill forest of Phulchowki near Kathmandu and a hunt for the spiny babbler, Nepal's only endemic bird, to cover the country's contrasting habitats in one trip. For the network of reserves that underpins Nepal's birdlife, browse the national parks of Nepal collection.
Watching responsibly
Keep your distance from feeding and roosting flocks, avoid flushing birds for a photo, and stay on the embankments and tracks to protect the grassland and nests. Carry binoculars and a scope for the open wetland, go with a guide who birds ethically, and take all litter out with you.
Frequently asked questions
How many bird species are at Koshi Tappu?+
More than 480 bird species have been recorded at Koshi Tappu Wildlife Reserve, making it the richest birding site in Nepal. Its wetlands are a vital stop for migratory waterbirds in winter, including ducks, geese, storks, ibises, waders, gulls and terns.
When is the best time to go birding at Koshi Tappu?+
Winter, from November to February, is the prime birding season, when huge numbers of migratory waterbirds gather and the weather is cool and dry. The monsoon floods large areas, and the pre-monsoon months are hot and humid, with fewer birds about.
Which birds are special at Koshi Tappu?+
Koshi Tappu is famous for waterbirds and wetland specialists, including swamp francolin, Bengal florican on the grasslands, storks and ibises, and a great range of ducks, raptors and waders. Rarities turn up regularly, drawing birders from around the world.
How do you go birding at Koshi Tappu?+
Birding is done on foot along the river embankments and grassland edges, and by boat on the Koshi channels at dawn. Hire a licensed local bird guide at the reserve headquarters; they know the seasonal hotspots, the calls and the current rarities.
