email a friend
printable version
CR
Beck's Petrel Pseudobulweria becki

IUCN Red List Criteria

Critically Endangered C2a(ii) 
Endangered C2a(i,ii);D1+2 
Vulnerable C2a(i,ii);D 

IUCN Red List history

Year Category
2013 Critically Endangered
2012 Critically Endangered
2010 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened

Species attributes

Migratory status full migrant Forest dependency High
Land mass type   Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 120,000 medium
Extent of Occurrence non-breeding (km2) 121,000 medium
Number of locations 1 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 50-249 poor Estimated 2008
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 51-249 - - -
Generation length (yrs) 17.7 - - -
Population justification: The population is assumed to be very small, with the species only definitely known from two specimens taken in 1928 and 1929 until its rediscovery in 2007. However, estimates of 160 birds off New Ireland in 2008 suggest it may be more numerous than previously suspected, although this was a summed count made over multiple days. It is placed in the band 50-249 mature individuals here, equivalent to 75-374 individuals in total, rounded here to 70-400 individuals.
Trend justification: It may have declined severely from depredation by introduced cats and rats on its breeding grounds (which are unknown but probably include, or are restricted to, New Ireland). However, the rate of decline has not been estimated.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
American Samoa Unknown Extant        
Australia Unknown Extant        
Fiji Unknown Extant        
Micronesia, Federated States of Unknown Extant        
Nauru Unknown Extant        
New Caledonia (to France) Unknown Extant        
Niue (to New Zealand) Unknown Extant        
Norfolk Island (to Australia) Unknown Extant        
Papua New Guinea Native Extant Yes      
Samoa Unknown Extant        
Solomon Islands Native Extant Yes      
Tokelau (to New Zealand) Unknown Extant        
Tonga Unknown Extant        
Tuvalu Unknown Extant        
Vanuatu Unknown Extant        
Wallis and Futuna Islands (to France) Unknown Extant        

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane 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 breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel suitable non-breeding
Marine Neritic Subtidal Rock and Rocky Reefs suitable breeding
Marine Neritic Subtidal Rock and Rocky Reefs suitable non-breeding
Marine Neritic Subtidal Sandy suitable breeding
Marine Neritic Subtidal Sandy suitable non-breeding
Marine Neritic Subtidal Sandy-Mud suitable breeding
Marine Neritic Subtidal Sandy-Mud suitable non-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 0 - 0 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2014) Species factsheet: Pseudobulweria becki. Downloaded from http://www.birdlife.org on 03/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 03/09/2014.

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.

Key facts
Current IUCN Red List category Critically Endangered
Family Procellariidae (Petrels, Shearwaters)
Species name author (Murphy, 1928)
Population size 50-249 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 120,000 km2
Country endemic? No
Links to further information
- Summary information on this species