|Central coordinates||94o 38.00' East 26o 59.00' North|
|IBA criteria||A1, A4i|
|Year of IBA assessment||2004|
Site description This IBA site includes three large historic tanks Joysagar (60 ha), Sivasagar (50 ha) and Gourisagar (40 ha) and their high banks in and around Sibsagar town in eastern Assam. Since time immemorial, birds have been protected in these sacred temple tanks. Every winter hundreds, often thousands, of ducks and geese spend the whole day resting and feeding on these tanks, which are easily accessible by metalled roads. The surrounding terrain is flat plain country. Sibsagar and Joysagar tanks are known for their spectacular flocks of ducks and geese. The largest wintering flocks of Bar-headed Anser indicus and Greylag Anser anser geese ever recorded in Assam, were in Joysagar tank. About 5,800 and 3,000 respectively were counted in 1995 (Bibhab Talukdar in Choudhury 2000). Most of the tanks are open water but on the margins there is emergent and floating vegetation. Fortunately, these tanks are free from Water Hyacinth Eichhornia crassipes.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Baer's Pochard Aythya baeri||winter||2004||present||-||A1||Critically Endangered|
|Greylag Goose Anser anser||-||2004||present||-||A4i||Least Concern|
|Bar-headed Goose Anser indicus||-||2004||present||-||A4i||Least Concern|
|Lesser Adjutant Leptoptilos javanicus||resident||2004||present||-||A1||Vulnerable|
|Greater Adjutant Leptoptilos dubius||breeding||2004||present||-||A1||Endangered|
|White-rumped Vulture Gyps bengalensis||non-breeding||2004||present||-||A1||Critically Endangered|
|Slender-billed Vulture Gyps tenuirostris||non-breeding||2004||present||-||A1||Critically Endangered|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Artificial - aquatic||-|
|Land-use||Extent (% of site)|
|Notes: Human habitation|
Acknowledgements Key contributors: Diptimanta Barooh, Anwaruddin Choudhury and Kulojyoti Lahkar.
Choudhury, A. U. (1988) Some rare ornithological records from Sibsagar, Assam. Cheetal 29(2): 3- 9.
Choudhury, A. U. (1991) Bird observations from Sibsagar District, Assam, India. Forktail 6: 35-42.
Choudhury, A. U. (2000) The Birds of Assam. Gibbon Books & WWFIndia NE Region, Guwahati. Pp. 240.
Wetlands International (2002) Waterbird Population Estimates – Third Edition. Wetlands International Global Series No. 12. Wageningen, The Netherlands.
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Recommended citation BirdLife International (2014) Important Bird Areas factsheet: Sibsagar Tanks. Downloaded from http://www.birdlife.org on 02/10/2014
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