Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
Turbott, E. G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Turbott, E.G. 1990. Checklist of the birds of New Zealand. Ornithological Society of New Zealand, Wellington.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | D2 |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Vulnerable | D2 |
| 2013 | Vulnerable | D2 |
| 2012 | Vulnerable | D2 |
| 2008 | Vulnerable | D2 |
| 2006 | Vulnerable | |
| 2004 | Vulnerable | |
| 2000 | Vulnerable | |
| 1996 | Vulnerable | |
| 1994 | Vulnerable | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | Medium |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 180 | medium |
| Extent of Occurrence breeding/resident (km2) | 5 | good |
| Number of locations | 4 | - |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 1800-2200 | medium | estimated | 1996 |
| Population trend | Stable | medium | suspected | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | 4 | - | - | - |
| Percentage in largest subpopulation | 1-89 | - | - | - |
| Generation length (yrs) | 5.7 | - | - | - |
Population justification: Higgins and Davies (1996) estimated the population to number 700-800 pairs on South East Island, possibly 200-250 pairs on Mangere Island and fewer than 50 pairs on Little Mangere Island and Star Keys. The population is thus estimated to fall within the range 1,800-2,200 mature individuals, roughly equating to 2,700-3,300 individuals in total.
Trend justification: Although the historical range of the species was reduced by introduced predators, it now appears to be stable.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| New Zealand | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| New Zealand | Chatham Islands |
| New Zealand | Mangere |
| New Zealand | Rangatira South East Island |
| New Zealand | Star Keys Motuhope |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Temperate | major | resident |
| Grassland | Temperate | major | resident |
| Altitude | 0 - 287 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | No decline | Low Impact: 4 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Gallirallus australis | Timing | Scope | Severity | Impact | ||||
| Ongoing | Low Impact: 3 | ||||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Named species | Timing | Scope | Severity | Impact | ||||
| Past, Likely to Return | Minority (<50%) | No decline | Past Impact | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Problematic native species/diseases | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | No decline | Low Impact: 4 | ||||||
|
|||||||||
Recommended citation
BirdLife International (2022) Species factsheet: Coenocorypha pusilla. Downloaded from
http://www.birdlife.org on 01/10/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 01/10/2022.
