IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
B2ab(v) |
| Vulnerable |
A2e+3e;D2 |
IUCN Red List history
| Year |
Category |
| 2012 |
Endangered |
| 2010 |
Endangered |
| 2008 |
Endangered |
| 2007 |
Vulnerable |
| 2006 |
Vulnerable |
| 2004 |
Vulnerable |
| 2000 |
Vulnerable |
| 1996 |
Vulnerable |
| 1994 |
Vulnerable |
| 1988 |
Lower Risk/Least Concern |
Species attributes
| Migratory status |
full migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
15,700,000 |
medium |
| Area of Occupancy breeding/resident (km2) |
64 |
good |
| Number of locations |
2 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
|
medium |
Estimated |
2001 |
| Population trend |
Decreasing |
poor |
|
- |
| Number of subpopulations |
1 |
- |
- |
- |
| Largest subpopulation |
|
- |
- |
- |
| Generation length (yrs) |
15.6 |
- |
- |
- |
|
Population justification: On Gough, Cuthbert in litt. (2001) estimated 1.8 million breeding pairs, suggesting a world population of around 5 million birds. |
|
Trend justification: R. Wanless in litt. (2007) has commented that population models using data (except breeding success) from Bermuda Petrel Pterodroma cahow suggest the populaiton is declining at a rate of 1.3% per annum. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Antarctica |
Vagrant |
No |
|
|
|
| Argentina |
Native |
No |
|
Yes |
|
| Brazil |
Native |
No |
|
Yes |
|
| Falkland Islands (Malvinas) |
Native |
No |
|
Yes |
|
| Israel |
Vagrant |
No |
|
|
|
| Jordan |
Vagrant |
No |
|
|
|
| Namibia |
Native |
No |
|
Yes |
|
| South Africa |
Native |
No |
|
Yes |
|
| South Georgia & the South Sandwich Islands |
Vagrant |
No |
|
|
|
| St Helena (to UK) |
Native |
No |
Yes |
|
|
| Uruguay |
Native |
No |
|
Yes |
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| St Helena (to UK) |
Gough Island |
 |
| St Helena (to UK) |
Tristan da Cunha |
 |
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Marine Neritic |
Macroalgal/Kelp |
suitable |
non-breeding |
| Marine Neritic |
Macroalgal/Kelp |
suitable |
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 |
breeding |
| Marine Neritic |
Subtidal Sandy |
suitable |
non-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 |
| Shrubland |
Temperate |
major |
breeding |
|
Altitude
|
50 - 600 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Residential & commercial development |
Housing & urban areas |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
| Species mortality |
|
| Transportation & service corridors |
Shipping lanes |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
| Species mortality |
|
| Biological resource use |
Hunting & trapping terrestrial animals / Intentional use (species is the target) |
Timing |
Scope |
Severity |
Impact |
| Past, Unlikely to Return |
Minority (<50%) |
Negligible declines |
Past Impact |
| Stresses |
| Species mortality |
|
| Invasive non-native/alien species/diseases |
Problematic native species/diseases |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
| Species mortality |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / House Mouse (Mus musculus) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Whole (>90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
| Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Polynesian rat (Rattus exulans) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
| Reduced reproductive success |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Food (human) |
Whole |
Adults and juveniles |
Wild |
Subsistence, National |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Pterodroma incerta. Downloaded from
http://www.birdlife.org on 20/06/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 20/06/2013.
This information is based upon, and updates, the information published in BirdLife International (2000)
Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004)
Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.