Lena delta

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
Tundra Swan Cygnus columbianus LC breeding 2004 present A3, A4i
Lesser White-fronted Goose Anser erythropus VU breeding 2004 present A1, A3
Long-tailed Duck Clangula hyemalis VU breeding 2004 present A3, A4i
King Eider Somateria spectabilis LC breeding 2004 present A3, A4i
Steller's Eider Polysticta stelleri VU breeding 2004 present A3, A4i
Baikal Teal Sibirionetta formosa LC breeding 2004 present A1
Sabine's Gull Xema sabini LC breeding 2004 present A3, A4i
A4iii Species group - waterbirds n/a unknown 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)
Ust'-Lensky Zapovednik 1,433,000 protected area overlaps with site 0
Lena-Del'ta Resource Reserve 2,170,522 protected area overlaps with site 2,170,522


IUCN Habitat Habitat detail Extent (% of site)
Grassland Tundra -
Wetlands (inland) Estuarine waters -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Lena delta. Downloaded from on 17/05/2022.