The New Zealand Threat Classification System's long-term goal is to list all extant species that exist here according to their threat of extinction. The system is made up of manuals and corresponding taxa status lists. The status of each species group (birds, plants, reptiles, etc.) is assessed over a 3-year cycle.

Find out how we describe our species using the New Zealand Threat Classification System, which outlines nationally understood and consistent categories and criteria to determine risk of extinction.


The list is used to monitor the status of individual species and to allow higher-level reporting on the state of indigenous biodiversity.

Ensuring the persistence of threatened species

Progress is monitored through three indicators: extinct species, status of threatened species, and the status of at risk species.

Extinct species is measured through trends in the number of indigenous species that are extinct.

Status of threatened species and status of at risk species are measured through trends in:

  • The number of species in each category.

  • The number of species in each category under active management.

  • The demographic response to management at population level for selected species as case studies.

Assessments of the threat status of species are made using the New Zealand Threat Classification System, with the status of all species reviewed over a 3-year cycle. The system methodology was revised in 2008 to improve its usefulness.

Read more in Section 5.1 of DOC's Annual Report for year ended 30 June 2010.

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Upcoming meetings will be notified on current consultations pages.


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