IBA Criteria

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 estimate IBA Criteria Triggered
Fairy Prion Pachyptila turtur LC breeding 1990-2000 min 40,000 breeding pairs A4ii
Chatham Shag Leucocarbo onslowi CR breeding 1967-2011 50-83 nests A1, A4i
Pitt Shag Phalacrocorax featherstoni EN breeding 1990-2011 47-66 nests A1, A4i
Chatham Oystercatcher Haematopus chathamensis EN resident - present A1
Shore Plover Thinornis novaeseelandiae EN resident - present A1
Chatham Snipe Coenocorypha pusilla VU resident 1990-1996 200-250 breeding pairs A1, A4i
Chatham Parakeet Cyanoramphus forbesi VU resident - present A1
Black Robin Petroica traversi EN resident - present A1
A4iii Species group - seabirds n/a - - 20,000-49,999 breeding pairs 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

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Mangere Island Nature Reserve 115 protected area overlaps with site 0


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

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Mangere. Downloaded from on 07/03/2021.