email a friend
printable version
Location India, Assam
Central coordinates 91o 40.48' East  26o 7.00' North
IBA criteria A1, A4iii
Area 414 ha
Altitude 0
Year of IBA assessment 2004

Bombay Natural History Society

Site description Deepor Beel Bird Sanctuary, southwest of Guwahati city, is located in Kamrup (metropolitan) district, on the southern bank of the Brahmaputra river. The sanctuary is a permanent freshwater lake with abundant aquatic vegetation. Deepor is one of the largest of many such lakes or ‘beels’ in lower Assam. A Ramsar site, the Deepor beel covers an area of about 900 ha. At maximum flooding, it is c. 4 m deep, while during the dry season, the depth drops to about 1 m. The main sources of water of this lake are the Basistha and Kalamoni rivers, and local monsoon run-off between May and September. The Beel drains into the Brahmaputra river, located about 5 km away. About half of the Beel dries out during the winter and the exposed shores are converted into paddy fields. The southern side of the lake is contiguous with Rani Reserve Forest. The climate is humid and tropical monsoon, with a prolonged monsoon season from May to September, and a relatively cool, winter. A large variety of aquatic flora of tropical wetland are found in Deepor Beel and its adjoining areas. On one side, this IBA is surrounded by forest, with Terminalia belerica, Tectona grandis (plantation), Ficus bengalensis, and Bombax malabaricum as dominant tree species. The Giant Water Lily Euryale ferox is of considerable botanical and economic importance. Dominant aquatic plants include Eichhornia crassipes, Pistia stratiotes, Ottelia alismoides and Lemna minor. Most of the surrounding areas are under rice cultivation.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Baer's Pochard Aythya baeri winter  2004  present  A1  Critically Endangered 
Lesser Adjutant Leptoptilos javanicus resident  2004  present  A1  Vulnerable 
Greater Adjutant Leptoptilos dubius breeding  2004  present  A1  Endangered 
Spot-billed Pelican Pelecanus philippensis resident  2004  present  A1  Near Threatened 
Pallas's Fish-eagle Haliaeetus leucoryphus resident  2004  present  A1  Vulnerable 
White-rumped Vulture Gyps bengalensis non-breeding  2004  present  A1  Critically Endangered 
Greater Spotted Eagle Clanga clanga winter  2004  present  A1  Vulnerable 
Slender-billed Vulture Gyps tenuirostris non-breeding  2004  present  A1  Critically Endangered 
Spoon-billed Sandpiper Calidris pygmaea winter  2004  present  A1  Critically Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Deepor Beel Wetlands of International Importance (Ramsar) 4,000 unknown 0  
Diparbeel Sanctuary 414 is identical to site 414  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland)   -
Artificial - terrestrial   -

Land use

Land-use Extent (% of site)
agriculture -
Notes: Agriculture
fisheries/aquaculture -
Notes: Fishing
nature conservation and research -
Notes: Nature Conservation
water management -
Notes: Water management

Acknowledgements Key contributors: Anwaruddin Choudhury, Kulojyoti Lahkar and Prasanta Saikia.


Barman, R., P. Saikia, H. J. Singha, B. K. Talukdar and P. C. Bhattacharjee (1995) Study on the population trend of waterbirds at Deepar Beel Wildlife Sanctuary, Assam. Pavo 33 (1&2): 25-40.

BirdLife International (2001) Threatened Birds of Asia: The BirdLife International Red Data Book. BirdLife International, Cambridge, U.K.

Choudhury, A. U. (2000) The Birds of Assam. Gibbon Books and WWFIndia, NE Regional Office, Guwahati.

Saikia, P. and Bhattacharjee, P. C. (1987) A study of the avifauna of Deepor Beel, a potential bird sanctuary of Assam. Gauhati University, Assam. Unpublished report.

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Deepor Beel Bird Sanctuary. Downloaded from on 01/10/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife