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Location India, Assam
Central coordinates 95o 43.50' East  27o 39.50' North
IBA criteria A1
Area 6,050 ha
Altitude 0
Year of IBA assessment 2004

Bombay Natural History Society

Site description Dum Duma (2,880 ha), Dangori (920 ha) and Kumsong (2,250 ha), these three reserve forests in Tinsukia district, in eastern Assam constitute the IBA. The forests of all areas are Tropical Evergreen Rainforest types dominated by Dipterocarpus macrocarpus (Hollong) on flat plains. All these areas are surrounded by tea gardens and human settlements. These forests are known for their populations of White-winged Duck Cairina scutulata, but are also important for other wildlife, especially primates. The largest confirmed gathering of the White-winged Duck in the world was recorded in Dangori RF, where 14 were seen roosting at one site in 1995 (Choudhury 1996, 1998). The vegetation type of the sites is mainly Tropical Evergreen Rainforest, dominated by Dipterocarpus macrocarpus, Shorea assamica, Mesua ferrea, Terminalia myriocarpa, Artocarpus chaplasha, Dillenia indica, Anthocephalus cadamba, Bombax ceiba and Ficus spp. There are many jungle pools or ponds in these areas, which are the major haunts of the White-winged Duck.

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  Endangered 


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

Land use

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

Acknowledgements Key contributors: Anwaruddin Choudhury and Kulojyoti Lahkar.


Choudhury, A. U. (1996) Survey of the White-winged Wood Duck and 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. (1997) Current status of the Masked finfoot in India. Newsletter 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: Dum Duma, Dangori and Kumsong Reserve Forests. Downloaded from on 25/10/2014

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