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Location India, Assam
Central coordinates 95o 22.50' East  27o 28.50' North
IBA criteria A1
Area 774 ha
Altitude 119 - 122m
Year of IBA assessment 2004

Bombay Natural History Society



Site description Bherjan (105 ha), Borajan (493 ha) and Podumoni (176 ha) are tiny pockets of lowland tropical forest present in Tinsukia district, Assam. These forest areas have the distinction of having the highest biomass of primates anywhere in the Indian subcontinent (Choudhury 1995a, 1995b). The three areas are disjunct and separated by tea gardens and human habitations. These are entirely on the flat plains of the Brahmputra Valley, so they lie in the Endemic Bird Area called Assam Plains by BirdLife International (undated). Older alluvium of the River Brahmaputra covers all three areas. The compact and brownish soil is suitable for tea plantation, hence, all the forests have tea gardens on the fringe areas. There are small, scattered marshes, with swamps, covered with dense growth of grass and Alpinia herb. The natural vegetation of all these areas is Tropical Wet Evergreen ‘rainforest’ type. Bherjan is almost entirely covered with trees with closed canopy. The original vegetation has been replaced by a fairly old mixed plantation dominated by the deciduous species Lagerstroemia parviflora and Terminalia myriocarpa. The Podumoni part is mostly in a degraded state due to large-scale felling. The canopy has been very badly broken up. Only a few mature trees of Artocarpus, Bombax, Lagerstroemia and Mesua species can be seen. Bojaran is a pocket of excellent rainforest, dominated by Dipterocarpus macrocarpus. Except for Teak, all the species as in the other two forest pocket are found. Bamboo species are found in all areas. Stenochleana palustre, an edible fern, grows abundantly all over, especially in the openings and clearings.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Lesser Adjutant Leptoptilos javanicus resident  2004  present  A1  Vulnerable 
White-rumped Vulture Gyps bengalensis non-breeding  2004  present  A1  Critically Endangered 
Slender-billed Vulture Gyps tenuirostris non-breeding  2004  present  A1  Critically Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bherjan-Borajan-Podumoni Sanctuary 722 protected area contained by site 722  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest   -

Land use

Land-use Extent (% of site)
nature conservation and research -
Notes: Nature Conservation

Acknowledgements Key contributor: Anwaruddin Choudhury.

References 

BirdLife International (undated) Important Bird Areas (IBAs) of Asia: Project Briefing Book. Pp. 103 Unpublished.

Choudhury, A. U. (1995a) Wildlife Survey in Bherjan, Borajan and Podumoni Reserved Forests of Tinsukia District, Assam, with a proposal for a Wildlife Sanctuary. The Rhino Foundation for Nature in NE India, Guwahati, India.

Choudhury, A. U. (1995b) Primates in Bherjan, Borajan and Podumoni Reserved Forests of Assam, India. Asian Primates 5 (3&4): 10-11.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Bherjan-Borajan-Podumoni Wildlife Sanctuary. Downloaded from http://www.birdlife.org on 30/07/2014

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