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Location India, Karnataka
Central coordinates 76o 26.00' East  12o 24.00' North
IBA criteria A1, A4i, A4iii
Area 12,500 ha
Altitude 0
Year of IBA assessment 2004

Bombay Natural History Society

Site description The 12,500 ha Krishnarajasagar reservoir was formed by impounding the Kaveri river at Kannambadi in 1924. It is located at the confluence of three rivers, the Kaveri and its tributaries the Hemavathi and the Lakshmanathirtha. It was one of the earliest large dams constructed in India and at present irrigates 0.4 million hectares of land in Mysore and Mandya districts of southern Karnataka. Large marshes form at the points where the rivers enter the reservoir. They come into existence every year as the reservoir fills up by September, and are used by thousands of migrant wader birds on passage. The marshes and mudflats expand as water is withdrawn from the reservoir for irrigation and they are at peak in December-February. Fields of millet, sorghum and vegetables are cultivated around the reservoir. The floodplain marshes are used in summer to cultivate vegetables. During monsoon, water lilies are cultivated for their edible roots.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta 2004  present  A4i  Least Concern 
Bar-headed Goose Anser indicus 2004  present  A4i  Least Concern 
Spot-billed Pelican Pelecanus philippensis resident  2004  present  A1  Near Threatened 
White-rumped Vulture Gyps bengalensis non-breeding  2004  present  A1  Critically Endangered 
Greater Spotted Eagle Clanga clanga winter  2004  present  A1  Vulnerable 
Little Stint Calidris minuta 2004  present  A4i  Least Concern 
Temminck's Stint Calidris temminckii 2004  present  A4i  Least Concern 
Brown-headed Gull Larus brunnicephalus 2004  present  A4i  Least Concern 
A4iii Species group - waterbirds unknown  2004  20,000 individuals  unknown  A4iii   


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

Land use

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

Acknowledgements Key contributors: Thejaswi Shivanand and A. Shivaprakash.


Thejaswi, S. (ed.) The Birds of Mysore: An Annotated Checklist of the birds of Mysore, Mandya and Chamarajanagar districts. Unpublished.

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: Krishnarajasagar Reservoir. Downloaded from on 22/10/2014

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