Taxonomic source(s)
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Turbott, E.G. 1990. Checklist of the Birds of New Zealand. Ornithological Society of New Zealand, Wellington.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
A2ce | A2ce; D | A2ce; D1+2 |
Year | Category | Criteria |
---|---|---|
2018 | Critically Endangered | A2ce |
2016 | Critically Endangered | A2ce |
2015 | Critically Endangered | A2ce |
2012 | Critically Endangered | A2ce |
2010 | Critically Endangered | A2c,e; C2a(ii) |
2009 | Critically Endangered | A2c,e; B2a+b(v); C2a(ii) |
2008 | Critically Endangered | |
2007 | Critically Endangered | |
2006 | Critically Endangered | |
2004 | Critically Endangered | |
2000 | Critically Endangered | |
1996 | Critically Endangered | |
1994 | Critically Endangered | |
1988 | Threatened |
Migratory status | full migrant | Forest dependency | High |
Land mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 1,850,000 | medium |
Extent of Occurrence breeding/resident (km2) | 2 | medium |
Number of locations | 1 | - |
Fragmentation | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 80-100 | good | estimated | 2012 |
Population trend | Increasing | poor | estimated | - |
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 | 1 | - | - | - |
Largest subpopulations | 100 | - | - | - |
Generation length (yrs) | 19.5 | - | - | - |
Population justification: In 2012, the total population was estimated to number around 150-200 individuals, including 80-100 mature individuals (G. Taylor in litt. 2012).
Trend justification: Although intensive conservation management (predator control in particular), appears to have allowed the population to increase slowly since the late 1990s, the species has undergone a severe decline over the last century, in excess of 80% over the last 60 years (c. three generations). The species is very long-lived with two birds first captured as adults in October 1982 still breeding in 2015 (G. Taylor and D. Boyle pers. comm. 2016)
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 | Main Chatham |
New Zealand | Chatham Island1 |
New Zealand | Tuku |
New Zealand | Chatham Islands (nearshore) |
New Zealand | Chatham (offshore) |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Temperate | major | breeding |
Marine Neritic | Macroalgal/Kelp | suitable | non-breeding |
Marine Neritic | Macroalgal/Kelp | suitable | breeding |
Marine Neritic | Pelagic | suitable | non-breeding |
Marine Neritic | Pelagic | suitable | breeding |
Marine Neritic | Seagrass (Submerged) | suitable | non-breeding |
Marine Neritic | Seagrass (Submerged) | suitable | breeding |
Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | non-breeding |
Marine Neritic | Subtidal Loose Rock/pebble/gravel | suitable | breeding |
Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | non-breeding |
Marine Neritic | Subtidal Rock and Rocky Reefs | suitable | breeding |
Marine Neritic | Subtidal Sandy | suitable | non-breeding |
Marine Neritic | Subtidal Sandy | suitable | breeding |
Marine Neritic | Subtidal Sandy-Mud | suitable | non-breeding |
Marine Neritic | Subtidal Sandy-Mud | suitable | breeding |
Marine Oceanic | Epipelagic (0-200m) | major | non-breeding |
Marine Oceanic | Epipelagic (0-200m) | major | breeding |
Marine Oceanic | Mesopelagic (200-1000m) | major | non-breeding |
Marine Oceanic | Mesopelagic (200-1000m) | major | breeding |
Altitude | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Whole (>90%) | Slow, Significant Declines | Past Impact | ||||||
|
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Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Majority (50-90%) | Slow, Significant Declines | Low Impact: 4 | ||||||
|
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Climate change & severe weather | Storms & flooding | Timing | Scope | Severity | Impact | ||||
Past, Likely to Return | Whole (>90%) | Negligible declines | Past Impact | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Bos taurus | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Canis familiaris | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Erinaceus europaeus | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Gallirallus australis | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Ovis aries | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | No decline | Low Impact: 4 | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus exulans | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Negligible declines | Medium Impact: 6 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus norvegicus | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus rattus | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Negligible declines | Medium Impact: 6 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Sus domesticus | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Trichosurus vulpecula | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | No decline | Low Impact: 5 | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Food - human | - | - | - | Non-trivial | Recent | |
Food - human | - | - | Non-trivial | Recent |
Recommended citation
BirdLife International (2021) Species factsheet: Pterodroma magentae. Downloaded from
http://www.birdlife.org on 05/03/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 05/03/2021.