IUCN Red List Criteria
| Near Threatened (criteria nearly met) |
B2ab(iii,v);D2 |
IUCN Red List history
| Year |
Category |
| 2012 |
Near Threatened |
| 2010 |
Near Threatened |
| 2008 |
Near Threatened |
| 2004 |
Near Threatened |
| 2000 |
Lower Risk/Near Threatened |
| 1994 |
Lower Risk/Least Concern |
| 1988 |
Near Threatened |
Species attributes
| Migratory status |
full migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
shelf island
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
8,090,000 |
medium |
| Number of locations |
|
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
1500-7000 |
poor |
Estimated |
1992 |
| Population trend |
Increasing |
poor |
|
- |
| Number of subpopulations |
|
- |
- |
- |
| Largest subpopulation |
|
- |
- |
- |
| Generation length (yrs) |
23.9 |
- |
- |
- |
|
Population justification: This is not a particularly rare bird at sea, and the total population runs into thousands, if not tens of thousands. Based on this judgement, the population is placed in the range 2,500-9,999 individuals. This equates to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals. |
|
Trend justification: Observations suggest that the population may be increasing. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Australia |
Vagrant |
No |
|
Yes |
|
| British Indian Ocean Territory |
Unknown |
No |
|
|
|
| Burkina Faso |
Native |
No |
|
Yes |
|
| Côte d'Ivoire |
Native |
No |
|
Yes |
|
| Central African Republic |
Native |
No |
|
Yes |
|
| Chad |
Native |
No |
|
Yes |
|
| Djibouti |
Vagrant |
No |
|
|
|
| India |
Unknown |
No |
|
|
|
| Indonesia |
Vagrant |
No |
|
|
|
| Iran, Islamic Republic of |
Unknown |
No |
|
|
|
| Kenya |
Vagrant |
No |
|
|
|
| Maldives |
Vagrant |
No |
|
|
|
| Mozambique |
Vagrant |
No |
|
|
|
| Niger |
Native |
No |
|
Yes |
|
| Oman |
Native |
No |
Yes |
|
|
| Pakistan |
Unknown |
No |
|
|
|
| Saudi Arabia |
Vagrant |
No |
|
|
|
| Seychelles |
Vagrant |
No |
|
|
|
| Somalia |
Native |
No |
|
Yes |
|
| Sri Lanka |
Unknown |
No |
|
|
|
| Togo |
Native |
No |
|
Yes |
|
| United Arab Emirates |
Vagrant |
No |
|
Yes |
|
| Yemen |
Native |
No |
|
|
|
Important Bird Areas where this species has triggered the IBA criteria
| Country/Territory |
IBA Name |
IBA link |
| Oman |
Halaaniyaat Islands |
 |
| Oman |
Masirah island |
|
| Yemen |
Al-Ikhwan |
|
| Yemen |
Ra's Fartak |
|
| Yemen |
Ra's Momi and Fikhah, Socotra |
|
| Yemen |
Sabuniya and Ka'l Fir'awn |
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Marine Neritic |
Macroalgal/Kelp |
major |
non-breeding |
| Marine Neritic |
Macroalgal/Kelp |
major |
breeding |
| Marine Neritic |
Pelagic |
major |
breeding |
| Marine Neritic |
Pelagic |
major |
non-breeding |
| Marine Neritic |
Seagrass (Submerged) |
major |
breeding |
| Marine Neritic |
Seagrass (Submerged) |
major |
non-breeding |
| Marine Neritic |
Subtidal Loose Rock/pebble/gravel |
major |
non-breeding |
| Marine Neritic |
Subtidal Loose Rock/pebble/gravel |
major |
breeding |
| Marine Neritic |
Subtidal Rock and Rocky Reefs |
major |
non-breeding |
| Marine Neritic |
Subtidal Rock and Rocky Reefs |
major |
breeding |
| Marine Neritic |
Subtidal Sandy |
major |
non-breeding |
| Marine Neritic |
Subtidal Sandy |
major |
breeding |
| Marine Neritic |
Subtidal Sandy-Mud |
major |
breeding |
| Marine Neritic |
Subtidal Sandy-Mud |
major |
non-breeding |
| Marine Oceanic |
Epipelagic (0-200m) |
major |
non-breeding |
| Marine Oceanic |
Epipelagic (0-200m) |
major |
breeding |
| Rocky areas (eg. inland cliffs, mountain peaks) |
|
major |
breeding |
|
Altitude
|
0 - 0 m
|
Occasional altitudinal limits
|
|
Threats & impact
| 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 |
Minority (<50%) |
Slow, Significant Decline |
Past Impact |
| Stresses |
|---|
| Reduced reproductive success, Species mortality |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Negligible declines |
Low Impact: 5 |
| Stresses |
|---|
| Reduced reproductive success, Species mortality |
|
| Invasive non-native/alien species/diseases |
Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Negligible declines |
Low Impact: 5 |
| 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: Bulweria fallax. Downloaded from
http://www.birdlife.org on 21/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 21/05/2013.
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.
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