Nagi Dam Wildlife Sanctuary Jamui | Ramsar Site & Bar-Headed Goose Haven

Overview: The Granitic Goose Haven of South Bihar

Nestled amidst the undulating granitic outcrops and scrubby plateaus of southern Jamui district near Jhajha, Nagi Dam Wildlife Sanctuary represents one of India's most extraordinary human-engineered wetland conservation triumphs.

Originally created in the 1960s through the damming of the seasonal Nagi River for agricultural irrigation, the resulting 7.91 square kilometer reservoir quickly evolved into a premier staging and wintering destination for migratory waterbirds traveling along the Central Asian Flyway. Notified as a wildlife sanctuary by the Bihar Government in 1984 and officially declared an **Important Bird and Biodiversity Area (IBA)** by BirdLife International, Nagi Dam received global recognition in 2024 with its designation as a **Ramsar Wetland of International Importance (Site No. 2541)** alongside its sister reservoir, Nakti Dam.

The defining ecological highlight of Nagi Dam is its status as a premier winter stronghold for the Bar-headed Goose (Anser indicus). Winter census counts regularly document between 10,000 and 15,000 individuals congregating across its open waters and sand spits, representing well over $1\%$ of the total biogeographical population of the species. In January 2021, the sanctuary made national headlines when the Bihar Government chose Nagi Dam to host **'Kalrav'**, the state's inaugural state-level bird festival.

Geomorphology, Reservoir Hydrology & Surrounding Scrub

Unlike the alluvial oxbow lakes of North Bihar, Nagi Dam is framed by an ancient geological setting of weathered granitic and gneissic hillocks characteristic of the Chota Nagpur Plateau northern fringe. The reservoir features expansive bodies of clear open water, low-gradient shoreline mudflats, and rocky islands that remain safe from terrestrial predators.

The surrounding terrestrial landscape consists of Northern Dry Mixed Deciduous Scrub dominated by thorny shrubs, acacia thickets, and open grassland patches:

Ecological Zones of Nagi Dam Sanctuary

Deep Reservoir Basin: Provides secure night-roosting open water for large goose flocks and deep foraging grounds for diving ducks like the tufted duck and common pochard.
Gently Sloping Shorelines & Sandbars: Emergent mudflats where waders, plovers, and sandpipers probe for insect larvae, small crustaceans, and molluscs.
Surrounding Granitic Scrub: Inhabited by scrubland birds and small nocturnal mammals, including the Indian courser, yellow-wattled lapwing, and small Indian civet.

Bar-Headed Goose Stronghold & Avian Assemblages

Every winter from November to March, the skies above Nagi Dam reverberate with the resonant honking of thousands of trans-Himalayan migrants:

Waterfowl Counts & Winter Migration Data at Nagi Dam

Avian Group	Key Documented Species	Winter Status	Foraging Behavior
Trans-Himalayan Geese	Bar-headed Goose (Anser indicus), Greylag Goose	10,000–15,000 individuals	Roosts on open reservoir; grazes on peripheral grasses and sprouted winter crops at dawn.
Diving Ducks	Tufted Duck, Common Pochard, Ferruginous Duck	3,000–5,000 individuals	Dives in 1.5–3m deep water zones for aquatic weeds, seeds, and bottom invertebrates.
Dabbling Ducks	Northern Pintail, Gadwall, Garganey, Eurasian Wigeon	4,000–6,000 individuals	Surface-filters submerged vegetation in shoreline shallows.
Shorebirds & Waders	Black-winged Stilt, Common Sandpiper, Little Ringed Plover	Common winter residents	Probes exposed mudflats and rocky shore edges for worms and snails.

Bar-headed Goose

Anser indicus • Flagship Species

Famed as one of the world's highest-flying birds, capable of crossing the Himalayan summits above 8,000 meters, finding essential winter sustenance at Nagi.

Indian Courser

Cursorius coromandelicus • Resident

Ground-dwelling wader inhabiting the stony scrublands surrounding the reservoir, running with great speed to catch insects and spiders.

Yellow-wattled Lapwing

Vanellus malabaricus • Resident

Striking terrestrial plover characterized by brilliant yellow facial wattles, nesting on gravelly ground near the sanctuary margins.

Tufted Duck

Aythya fuligula • Winter Migrant

Distinctive black-and-white diving duck with a slender head plume, congregating in dense rafts in the deepest central waters of the dam.

Terrestrial Fauna & Scrubland Ecology

In addition to its world-class avifauna, the granitic hills enclosing Nagi Dam support resilient populations of dry-zone mammals:

Small Indian Civet (Viverricula indica): Nocturnal solitary predator roaming scrub thickets for rodents and wild berries.
Jungle Cat (Felis chaus): Frequently sighted hunting waterfowl and field mice in the tall grasses bordering irrigation channels.
Indian Hare & Golden Jackal: Ubiquitous across the grassland borders; jackal packs contribute to ecosystem sanitation.
Reptilian Diversity: Indian rock python, checkered keelback (in reservoir shallows), Indian monitor lizard, and banded krait.

The 'Kalrav' State Bird Festival & Eco-Development

In January 2021, Nagi Dam was chosen as the inaugural venue for Bihar's state bird festival, **'Kalrav'**, organized by the Department of Environment, Forest and Climate Change.

The festival attracted leading ornithologists, wildlife photographers, and school students from across India, catalyzing major infrastructure improvements including the installation of modern birdwatching watchtowers, solar lighting, paved access tracks, and training for local village youths as certified eco-guides. The festival cemented Nagi Dam's reputation as a flagship ecotourism model for Bihar.

Visitor Information & Birdwatching Guidelines

Nagi Dam provides one of the most accessible and visually stunning birdwatching experiences in Eastern India:

Visiting Guidelines & Best Season

Best Visiting Months: November to February. Late December to mid-January provides the peak spectacle of thousands of geese in flight.
Dawn & Dusk Flight Spectacle: Position yourself near the main dam bund between 06:00 AM – 07:30 AM to witness thousands of geese taking off in V-formations towards surrounding fields, and returning between 04:30 PM – 05:30 PM.
Twin Sanctuary Circuit: Combine your visit with Nakti Dam Wildlife Sanctuary, located just 4 km away, which offers specialized diving duck habitats.
Ethics: Do not fly drones over the water body; avoid loud music or honking along the reservoir bund road; maintain silence on viewing watchtowers.

How to Reach Nagi Dam Wildlife Sanctuary

Nagi Dam is well connected via road and rail in south-eastern Bihar:

Transit & Gateway Routes

By Train: Jhajha Railway Station (JAJ) is just 12 km away, situated on the main Delhi-Kolkata (via Patna/Asansol) mainline with dozens of daily express trains. Jamui Railway Station (JMU) is approx. 35 km away.
By Road: From Jamui (approx. 35 km south via Jhajha) or from Deoghar (approx. 75 km north via Jasidih and Jhajha). Paved roads lead directly to the sanctuary watchtower bund.
Nearest Airport: Deoghar International Airport (DGH), Jharkhand (~75 km), offering regular domestic flights to Delhi, Kolkata, Bengaluru, and Patna. Patna Airport (PAT) is approx. 180 km northwest.

Frequently Asked Questions

What makes Nagi Dam Wildlife Sanctuary famous?

Nagi Dam is internationally famous as a declared Ramsar Wetland Site (No. 2541) that hosts over 1% of the global population of the Bar-headed Goose (10,000–15,000 individuals every winter) and as the host venue of Bihar's first state bird festival 'Kalrav'.

Which district is Nagi Dam located in?

Nagi Dam Wildlife Sanctuary is located in Jamui district in southeastern Bihar, near the railway town of Jhajha.

Can Nagi Dam and Nakti Dam be visited together?

Yes, Nagi Dam and Nakti Dam are twin sanctuaries located just 4 to 5 km apart and can be easily explored together in a single half-day or full-day birding circuit.

When was Nagi Dam declared a Ramsar Site?

Nagi Dam was officially designated as a Ramsar Wetland of International Importance (Site No. 2541) by the Ramsar Convention Secretariat in 2024.

Nagi Dam Wildlife Sanctuary