027 550 0611The definition and status of species in the Tangihua ranges
An effective species threat classification system provides a fundamental framework to biodiversity recovery programmes.
Panels of experts from New Zealand’s scientific community determine conservation statuses using the following assessments:
- What’s the current population size? This can be the number of breeding adults or the area of occupied habitat.
- How much is the population estimated to rise or fall over either the next three generations or 10 years (whichever is longer)?
- If the population is stable, has it declined in the past?
- Is the population state a result of human-induced effects?
| Status | Classification | Birds |
|---|---|---|
| Extinct
No longer exists |
Nationally extinct
No longer exists anywhere |
Moa |
| Extinct locally
No longer exists in the forest but have survived elsewhere |
Bellbird Kokako North Island Robin Red-crowned Kakariki Rifleman Yellow-crowned Kakariki |
|
| Functionally extinct locally
Exist in the forest but are unable to breed and will become extinct in the short term. |
North Island Brown Kiwi Kaka |
–
| Status | Classification | Species |
|---|---|---|
| Threatened
Threatened species have the greatest risk of extinction. |
Nationally Critical
most severely threatened, facing an immediate high risk of extinction. Nationally Endangered facing high risk of extinction in the short term. Nationally Vulnerable facing a risk of extinction in the medium term. |
Kokopu |
| At Risk
At Risk species aren’t considered Threatened, but they could quickly become so if declines continue, or if a new threat arises. |
Declining
population declining but still common. Recovering small population but increasing after previously declining. Relict small population stabilised after declining. Naturally uncommon naturally small population and therefore susceptible to harmful influences. |
|
| Not threatened | Everything else |
