Northern Titi Muttonbird Islands

IBA Justification

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
Weka Gallirallus australis VU resident - present A1
Yellow-eyed Penguin Megadyptes antipodes EN resident 1932-1990 40-66 breeding pairs A1, A4ii
Sooty Shearwater Ardenna grisea NT breeding 2013 100,000-499,999 breeding pairs A4ii
Stewart Island Shag Leucocarbo chalconotus VU breeding 1911-2011 384-922 breeding pairs A1, A4i
A4iii Species group - seabirds n/a - - 100,000-499,999 breeding pairs A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2014).

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Whero Rock Nature Reserve 1 protected area overlaps with site 0
Nature Reserve - Bench Island Nature Reserve 176 protected area overlaps with site 176


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Marine Coastal/Supratidal -
Shrubland -
Forest -
Marine Intertidal -
For more information about the IUCN Habitat classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Northern Titi Muttonbird Islands. Downloaded from on 21/09/2023.