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Location India, Assam
Central coordinates 94o 23.00' East  27o 25.00' North
IBA criteria A1, A2, A4i
Area 3,000 ha
Altitude 0
Year of IBA assessment 2004

Bombay Natural History Society



Site description This IBA site includes a large marshy tract with beels and grassland in eastern Assam. It lies partly in Dhakuakhana subdivision of Lakhimpur district (Sampora area) and Dhemaji district (Bordoloni area). Situated 50 km east of Lakhimpur town, this site is important for waterbirds. The terrain is flat, being on the floodplains. During monsoon, a major part of the IBA is completely inundated.

Key Biodiversity 

AVIFAUNA: Although a full checklist is not available, this wetland complex was covered during various waterfowl counts and information on many threatened species is available. Particularly noteworthy are records of the Endangered White-bellied Heron Ardea insignis and large populations of the Swamp Francolin Francolinus gularis (Choudhury 2000). Vultures (common till the 1990s), Greater Adjutant Leptoptilos dubius and Spot-billed Pelican Pelecanus philippensis are other important species recorded. This IBA was proposed as a bird sanctuary in late the 1980s (Choudhury 1991). It is highly likely to harbour the Blackbreasted Parrotbill Paradoxornis flavirostris, as there are past records from the adjoining areas (BirdLife International 2001). A few thousand waterfowl, including ducks and geese, winter in this area while a few thousand Amur Falcons Falco amurensis migrate through it during fall. The site also fulfils for A4i criteria (1% of biogeographic population) due to the congregation of Amur Falcon. There is a nesting record of the Near Threatened Lesser Grey-headed Fish Eagle Ichthyophaga nana (= humilis) (Choudhury 2000).

OTHER KEY FAUNA: The Hog deer Axis porcinus, Fishing cat Prionailurus viverrina and the Rhesus Macaque Macaca mulatta are noteworthy (A. U. Choudhury pers. comm. 2003).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Swamp Francolin Francolinus gularis resident  2004  present  A1  Vulnerable 
Lesser Adjutant Leptoptilos javanicus resident  2004  present  A1  Vulnerable 
Greater Adjutant Leptoptilos dubius breeding  2004  present  A1  Endangered 
White-bellied Heron Ardea insignis resident  2004  present  A1  Critically Endangered 
Spot-billed Pelican Pelecanus philippensis resident  2004  present  A1, A4i  Near Threatened 
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 
Black-breasted Parrotbill Paradoxornis flavirostris resident  2004  present  A1, A2  Vulnerable 

Habitats

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

Land use

Land-use Extent (% of site)
agriculture -
Notes: Agriculture
fisheries/aquaculture -
Notes: Fishing
forestry -
Notes: Forestry

Acknowledgements Key contributor: Anwaruddin Choudhury.

References 

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

Choudhury, A. U. (1991) New Dhakuakhana Sub-Division. Annual Report. Revenue, Relief and Rehabilitation, and Registration Departments, Govt. of Assam, 1990-91: Pp. 111-117.

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

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Bordoloni - Sampora. Downloaded from http://www.birdlife.org on 28/12/2014

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