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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Robertson, C. J. R.; Nunn, G. B. 1998. Towards a new taxonomy for albatrosses. In: Robertson, G.; Gales, R. (ed.), Albatross biology and conservation, pp. 13-19. Surrey Beatty & Sons, Chipping Norton, Australia.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Near Threatened | A4de |
| 2016 | Near Threatened | A4de |
| 2013 | Near Threatened | A4de |
| 2012 | Near Threatened | A2de+3de+4de |
| 2010 | Near Threatened | A2d,e; A3d,e; A4d,e |
| 2008 | Near Threatened | A4d,e |
| 2007 | Near Threatened | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | does not normally occur in forest |
| Land-mass type |
Land-mass type - shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 114,000,000 | medium |
| Extent of Occurrence non-breeding (km2) | 77,700,000 | medium |
| Area of Occupancy breeding/resident (km2) | 540 | medium |
| Severely fragmented? | no | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Number of mature individuals | 203600 | good | estimated | 2012 |
| Population trend | decreasing | poor | suspected | 1944-2010 |
| Decline % (10 years/3 generations past and future) | 20-29 | - | - | - |
| Generation length (years) | 23.1 | - | - | - |
Population justification: The annual breeding population varies considerably, and in recent years adjusted estimates have varied from lows of 73,838 breeding pairs in 2009 and 74,031 breeding pairs in 2013, to highs of 116,025 pairs in 2006 and 102,273 pairs in 2012 (Baker et al. 2014, 2015). The most recent count reported is of 101,798 breeding pairs in 2014 (Baker et al. 2015). This 2014 estimate equates to c.203,600 mature individuals, but this species is now considered to be a biennial breeder, meaning that the total population may in fact be much larger.
Trend justification: Pre-2006/2007 population estimates were not based on comparable methodologies to current census methods and therefore population trends cannot be calculated before this time. Count data over nine years show strong inter-annual fluctuations and trend analysis using regression splines showed no evidence for monotonic decline over the nine years (2006-2014) of the study (Baker et al. 2015). Further data are therefore required to confirm the population trend, which is retained, on a precautionary basis, as a moderately rapid on-going decline.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Angola | extant | uncertain | ||||
| Argentina | extant | uncertain | ||||
| Australia | extant | native | yes | yes | ||
| Brazil | extant | uncertain | ||||
| Chile | extant | uncertain | ||||
| Falkland Islands (Malvinas) | extant | uncertain | ||||
| French Southern Territories | extant | uncertain | ||||
| Heard Island and McDonald Islands (to Australia) | extant | uncertain | ||||
| Madagascar | extant | uncertain | ||||
| Mauritius | extant | uncertain | ||||
| Mozambique | extant | uncertain | ||||
| Namibia | extant | native | yes | |||
| New Zealand | extant | native | yes | yes | ||
| Norfolk Island (to Australia) | extant | uncertain | ||||
| Peru | extant | uncertain | ||||
| Réunion (to France) | extant | uncertain | ||||
| South Africa | extant | native | yes | |||
| South Georgia & the South Sandwich Islands | extant | uncertain | ||||
| St Helena (to UK) | extant | uncertain | ||||
| Uruguay | extant | uncertain |
| Country/Territory | IBA Name |
|---|---|
| New Zealand | Antipodes Islands |
| New Zealand | Adams Island |
| New Zealand | Disappointment Island |
| New Zealand | Main Auckland Island |
| New Zealand | Kaikoura (offshore) |
| New Zealand | Auckland Islands 1 (offshore) |
| New Zealand | Auckland Islands 2 (near-shore) |
| New Zealand | Antipodes (offshore) |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Grassland | Subantarctic | major | breeding |
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | breeding |
| Marine Neritic | Macroalgal/Kelp | suitable | non-breeding |
| Marine Neritic | Pelagic | major | breeding |
| Marine Neritic | Pelagic | major | non-breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | breeding |
| Marine Neritic | Seagrass (Submerged) | suitable | non-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 | breeding |
| Marine Oceanic | Epipelagic (0-200m) | major | non-breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | major | non-breeding |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Felis catus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Sus domesticus | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Recommended citation
BirdLife International (2023) Species factsheet: Thalassarche steadi. Downloaded from
http://datazone.birdlife.org/species/factsheet/white-capped-albatross-thalassarche-steadi on 04/10/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 04/10/2023.
