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|
|Black-winged Petrel Pterodroma nigripennis||LC||breeding||1988||2,500,000 breeding pairs||A4ii|
|White-necked Petrel Pterodroma cervicalis||VU||breeding||1988||50,000 breeding pairs||A1, A4ii|
|Wedge-tailed Shearwater Ardenna pacifica||LC||breeding||1988||40,000 breeding pairs||A4ii|
|Grey Noddy Anous albivittus||LC||breeding||1988||10,000||A4i|
|A4iii Species group - seabirds||n/a||breeding||1988||2,500,000-4,999,999 breeding pairs||A4iii|
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)|
|Kermadec Islands (All Islands)||Nature Reserve||3,353||protected area overlaps with site||318|
|Kermadec Islands||Marine Reserve||767,489||protected area overlaps with site||0|
|Kermadec||Benthic Protection Area||46,927,610||protected area contains site||0|
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
BirdLife International (2023) Important Bird Area factsheet: Macauley & Haszard Islands. Downloaded from http://datazone.birdlife.org/site/factsheet/macauley-&-haszard-islands-iba-new-zealand on 27/09/2023.