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Location India, Maharashtra
Central coordinates 73o 15.60' East  19o 31.30' North
IBA criteria A1, A3
Area 30,481 ha
Altitude 70 - 300m
Year of IBA assessment 2004

Bombay Natural History Society

Site description Tansa Wildlife Sanctuary is located 90 km northeast of Mumbai, in the foothills of the Sahyadris (Western Ghats). It extends over Wada, Shahapur and Mokhada talukas of Thane district. It has two rivers, the Tansa and Vaitarna, and the Sanctuary gets its name from the former which divides the Sanctuary into two parts. The Sanctuary forms the catchment area of Tansa lake, along with the surrounding forests of Khardi, Vaitarna, Wada and Shahapur ranges. The reservoir on the River Tansa occupying an area of c. 20 sq. km is under the administration of Brihanmumbai Municipal Corporation (BMC). Tansa reservoir, along with Vaitarna and Bhatsa reservoirs, is the major sources of water to the megacities of Mumbai and Thane. Five revenue villages located geographically within the Sanctuary, donot form part of the Sanctuary. More than 100 villages are found in the periphery of the Sanctuary, many dependent on the Sanctuary for livelihood. Within Tansa Sanctuary, there is a fort at Mahuli, situated on a 762 m high hill top, indicating the area’s historical importance. The Sanctuary has Southern Tropical Moist Deciduous Forest, with a few patches of Evergreen forest. The dominant species are Teak Tectona grandis, Khair Acacia katechu, Kadam Mitragyna parvifolia, Adina cordifolia, Mahua Madhuca indica, and Red Silk Cotton Bombax ceiba.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Pallas's Fish-eagle Haliaeetus leucoryphus resident  2004  present  A1  Vulnerable 
White-rumped Vulture Gyps bengalensis non-breeding  2004  present  A1, A3  Critically Endangered 
Indian Vulture Gyps indicus non-breeding  2004  present  A1  Critically Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Tansa Sanctuary 30,481 is identical to site 30,481  


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

Land use

Land-use Extent (% of site)
nature conservation and research -
Notes: Nature Conservation
water management -
Notes: Catchment area of reservoirs

Acknowledgements Key contributor: Sunil Laad.


Singh, D. F. and Pradhan, M. S. (1992) Vertebrate fauna of Tansa Wildlife Sanctuary, Maharashtra. Rec. Zool. Surv. India 91(3-4): 449-470.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Tansa Wildlife Sanctuary. Downloaded from on 21/08/2014

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