The site was identified as important in 2014 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.Populations meeting IBA criteria ('trigger species'):
|Species||Current IUCN Red List Category||Season||Year(s)||Population estimate at site||IBA criteria met|
|Fiordland Penguin Eudyptes pachyrhynchus||NT||breeding||1968-1980||115-261 breeding pairs||A1, A4ii|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2014).
|Protected area (PA)||PA designation||PA area (ha)||Relationship of PA with IBA||Overlap of PA with IBA (ha)|
|Open Bay Islands||Wildlife Refuge||16||protected area overlaps with site||0|
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
BirdLife International (2023) Important Bird Area factsheet: Open Bay Islands. Downloaded from http://datazone.birdlife.org/site/factsheet/open-bay-islands-iba-new-zealand on 23/09/2023.