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Location India, Assam
Central coordinates 95o 51.00' East  27o 20.00' North
IBA criteria A1, A3
Area 15,450 ha
Altitude 100 - 250m
Year of IBA assessment 2004

Bombay Natural History Society

Site description This IBA site in extreme eastern Assam includes seven reserve forests and two proposed reserve forests. The reserve forests are Burhidihing-North and South Block (2,295 ha), Kotha (1,130 ha), Namphai (2,100 ha), Tinkopani (3,030 ha), Tirap (1,454 ha), Tipong (445 ha) and additions to Tirap and Tipong (4, 995 ha). This IBA covers plains of the Burhi-Dihing River, as well as the foothills of Patkai Range. All these areas bear tropical rainforest and are known strongholds of the endangered White-winged Duck Cairina scutulata (Choudhury 1996a, 1998). The Masked Finfoot Heliopais personata has been also reported (Choudhury 1997). These forests are also rich in primates and other wildlife. A national highway and other roads pass through the area, making it accessible to a great extent. The approach to Namdapha National Park in Arunachal Pradesh is through this area and the habitat is still contiguous. The vegetation of the site is mainly Tropical Wet Evergreen type, with Dipterocarpus macrocarpus, Shorea assamica, Terminalia myriocarpa, Artocarpus chaplasha, Dillenia indica, and Ficus spp. dominating. The important grasses are Arundo donax, Phragmites karka, Imperata cylindrica, and Saccharum spp. found along riverbanks and in depressions.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
White-winged Duck Asarcornis scutulata resident  2004  present  A1  Endangered 
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 
Masked Finfoot Heliopais personatus resident  2004  present  A1, A3  Endangered 


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

Land use

Land-use Extent (% of site)
agriculture -
Notes: Agriculture
forestry -
Notes: Forest

Acknowledgements Key contributors: Anwaruddin Choudhury and Kulojyoti Lahkar.


Choudhury, A. U. (1996a) Survey of the White-winged Wood Duck and the Bengal Florican in Tinsukia district and adjacent areas of Assam and Arunachal Pradesh. The Rhino Foundation for Nature in NE India, Guwahati.

Choudhury, A. U. (1996b) Survey of primates in some parts of eastern and central Assam. Final report to ASTEC (Assam Science Tech. & Environment Council), Guwahati. Pp.32.

Choudhury, A. U. (1997) Current status of the Masked finfoot in India. News Letter for Birdwatchers 37(5): 90-91.

Choudhury, A. U. (1998) Status and conservation of the white-winged duck in eastern Assam, India. OBC Bulletin 28:14-17.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Tirap - Burhidihing. Downloaded from on 30/10/2014

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