Western Chain

IBA Justification

Year of most recent IBA criteria assessment: 2014

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population at site IBA criteria triggered
Snares Penguin Eudyptes robustus VU breeding 1976-1985 3,234-6,531 breeding pairs A1, A4ii
Salvin's Albatross Thalassarche salvini VU breeding 1976-2014 1,014-1,336 breeding pairs A1, A4ii
A4iii Species group - seabirds n/a - - 10,000-19,999 breeding pairs A4iii

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Snares Islands Nature Reserve 368 protected area contains site 0
New Zealand Sub-Antarctic Islands World Heritage Site (natural or mixed) 1,386,792 protected area contains site 0


IUCN Habitat Habitat detail Extent (% of site)
Marine Coastal/Supratidal -
Grassland Tussock grasslands -
Marine Intertidal -
For further information about the IUCN habitat classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Western Chain. Downloaded from on 05/06/2023.