Tiritiri Matangi Island

Size: 184 hectares

Site description

The Tiritiri Matangi Island biodiversity focus area is a wildlife sanctuary and internationally-acclaimed conservation project 3.5km off the eastern end of the Whangaparāoa Peninsula.

The sanctuary is managed by the Department of Conservation in partnership with the Supporters of Tiritiri Matangi, a voluntary community group and major contributor to the success of Tiritiri Matangi as a wildlife sanctuary. 

Tiritiri Matangi Island.
Tiritiri Matangi scientific reserve lies 3.5km to the east of Whangaparāoa in the Hauraki Gulf. The northern tip of the Coromandel Peninsula can be seen to the south.
Photo credit: Andrew Macdonald, Biospatial Ltd 2018

Ecosystems and vegetation

The vegetation on Tiritiri Matangi includes several remnants of coastal forest (WF4) with a canopy of pōhutukawa, kohekohe and pūriri in gullies and around the coast. Pōhutukawa treeland/flaxland/rockland (CL1) is found on the coastal cliffs.

The remainder of the native vegetation was planted as part of an extensive community restoration programme which began after grazing animals were removed from the island in 1972. Over 280,000 native shrubs and trees were planted during the main revegetation period from 1984 to 1994, with most of the plants sourced and grown on the island.

Conservation

The restoration of the island included the eradication of mammalian pests. There are now abundant native bird populations on Tiritiri Matangi, both self-introduced and from translocations.

Native birds successfully translocated to the island include:

  • red-crowned kākāriki
  • tīeke (North Island saddleback)
  • pāteke (brown teal)
  • pōpokatea (whitehead)
  • takahē
  • toutouwai (North Island robin)
  • kiwi pukupuku (little spotted kiwi)
  • hihi (stitchbird)
  • North Island kōkako
  • mātātā (North Island fernbird)
  • tītīpounamu (rifleman).

Other native fauna on the island  includes tuatara and species of skink and gecko. Invertebrates include the introduced and endangered wētāpunga. Freshwater fish include longfin and shortfin eels.

Extensive research undertaken on the island has provided information to assist and inform many other ecological restoration projects across New Zealand.

Related ecosystems

Cliff ecosystem

Pōhutukawa treeland, flaxland and rockland ecosystem (CL1)

This ecosystem occurs on coastal rock faces and eroding hill-slopes around the Auckland coastline and on offshore islands. It contains a mosaic of different plant communities including herbs, flax, shrubs and trees.

Threat status
Vulnerable

Warm forest ecosystem

Pōhutukawa, pūriri, broadleaved forest ecosystem (WF4)

Scattered along Auckland's coastlines, this broadleaved forest ecosystem provides an important source of food for kererū. They are also important seed dispersers for many species in this ecosystem.

Threat status
Endangered