Sunderbans (East, South, West Wildlife Sanctuaries)

IBA Criteria

Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Masked Finfoot Heliopais personatus CR resident 2004 present A1
Greater Adjutant Leptoptilos dubius EN non-breeding 2004 present A1
Lesser Adjutant Leptoptilos javanicus VU resident 2004 present A1
Spot-billed Pelican Pelecanus philippensis NT non-breeding 2004 present A1
Spoon-billed Sandpiper Calidris pygmaea CR winter 2004 present A1
Indian Skimmer Rynchops albicollis EN winter 2004 present A1
Pallas's Fish-eagle Haliaeetus leucoryphus EN resident 2004 present A1
A4iii Species group - waterbirds n/a - 2004 20,000 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
The Sundarbans World Heritage Site (natural or mixed) 139,700 protected area overlaps with site 139,699
Sundarbans Reserved Forest Ramsar Site, Wetland of International Importance 601,700 protected area overlaps with site 139,699
Sundarban West Wildlife Sanctuary 71,502 protected area overlaps with site 70,502
Sundarban South Wildlife Sanctuary 36,970 protected area contained by site 36,970
Sundarban East Wildlife Sanctuary 31,226 protected area overlaps with site 31,226


IUCN Habitat Habitat detail Extent (% of site)
Forest Mangrove forest (tropical) -
Marine Intertidal -
Marine Neritic -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Sunderbans (East, South, West Wildlife Sanctuaries). Downloaded from on 21/03/2023.