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Location India, Assam
Central coordinates 90o 30.00' East  26o 15.00' North
IBA criteria A1, A4iii
Area 4,600 ha
Altitude 30 - 499m
Year of IBA assessment 2004

Bombay Natural History Society

Site description Tamaranga-Dalani-Bhairab Complex includes the wetlands of Tamaranga, Konora, Paropota and Dalani, and an isolated hillock, Bhairab Pahar, in western Assam. The hillock has been proposed as a reserve forest. The area comprises four wetlands totalling more than 1,000 ha, and one proposed Reserve Forest of c. 3,605 ha. This IBA site is situated only 30 km from Bongaigaon town, the district headquarters. The beels (wetlands) are leased out by the Government for fishing. The proposed Reserve Forest is rocky hillock, part of an Archaean plateau, covered with degraded Moist Deciduous Forest and Bamboo brakes. Tamaranga and Dalani are large beels that attract many migratory birds including some rare ones. They are also good breeding grounds for resident waterbirds. The hill is surrounded by tribal settlements of the Bodo, Garo and Rabha tribes, who have been involved by the Forest Department under the Joint Forest Management scheme to protect the biodiversity. To promote ecotourism, the district administration has initiated a project named Bihanga Vihar. The wetlands are covered with Water Hyacinth Eichhornia crassipes. Wherever this pernicious weed is not found, submerged and emergent plants can be seen. The surrounding forest is Tropical Moist Deciduous, dominated by Sal Shorea robusta.

Key Biodiversity 

AVIFAUNA: More than 150 bird species are known to occur in this Complex, though the number could be much higher. The site regularly holds more than 20,000 waterfowl in winter so it qualifies A4iii criteria (= 20,000 waterbirds). It also harbours threatened species, so it fits A1 criteria also. As we do not have detailed data on the bird life of this site, we considered the site as Data Deficient.

OTHER KEY FAUNA: Other fauna of the site include mammals such as the Golden Langur Trachypithecus geei (Choudhury 2002), Rhesus Macaque Macaca mulatta, Wild Boar Sus scrofa, Leopard Panthera pardus, Chinese Pangolin Manis pentadactyla, Barking Deer Muntiacus muntjak, and a small herd of Gaur Bos frontalis. Reptiles such as the Elongated Turtle Indotestudo elongata have been recorded on Bhairab Pahar, while various softshell turtles occur in the beels.

Indian Rock Python Python molurus and Monitor Lizard Varanus bengalensis have also been recorded.

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 
Pallas's Fish-eagle Haliaeetus leucoryphus 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 
A4iii Species group - waterbirds unknown  2004  20,000 individuals  unknown  A4iii   


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

Land use

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

Acknowledgements Key contributors: Hilloljyoti Singha, Kulojyoti Lahkar and Sadashib Nath Sen.


Choudhury, A. U. (2000): The Birds of Assam, Gibbon Books & WWFIndia NE Region, Guwahati. Pp. 240.

Choudhury, A. U. (2002): Golden langur Trachypithecus geei threatened by habitat fragmentation. Zoo’s Print Journal 17 (2): 699-703.

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Tamaranga - Dalani - Bhairab Complex. Downloaded from on 19/04/2015

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