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Black Robin Petroica traversi

IUCN Red List Criteria

Critically Endangered  
Endangered D1+2 
Vulnerable

IUCN Red List history

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

Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type   Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 4 medium
Area of Occupancy breeding/resident (km2) 3 good
Number of locations 2 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 230 good Observed 2011
Population trend Increasing good -
Number of subpopulations 2 - - -
Largest subpopulation 190 - - -
Generation length (yrs) 7 - - -
Population justification: Full population surveys in spring 2011 found 190 mature individuals on Rangatira Island, and 34 on Mangere Island. A few birds were probably missed, and the total population size is therefore estimated at c.230 mature individuals in 2011 (E. S. Kennedy in litt. 2012).
Trend justification: Intensive conservation efforts boosted population sizes rapidly between 1980 and 1989 only. After intervention ceased, population sizes increased naturally though at a slower rate.. The most recent population estimate is higher than any since the population bottleneck of 1980 (E. S. Kennedy in litt. 2012).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
New Zealand Native Extant       Yes

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate major resident
Shrubland Temperate major resident
Altitude 0 - 280 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Causing/Could cause fluct Low Impact: 5
Stresses
Indirect ecosystem effects, Competition, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Domestic Cat (Felis catus) Timing Scope Severity Impact
Past, Likely to Return Majority (50-90%) No decline Past Impact
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Unspecified rats (Rattus spp.) Timing Scope Severity Impact
Past, Likely to Return Majority (50-90%) No decline Past Impact
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2014) Species factsheet: Petroica traversi. Downloaded from http://www.birdlife.org on 25/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 25/12/2014.

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 Endangered
Family Petroicidae (Australasian robins)
Species name author (Buller, 1872)
Population size 230 mature individuals
Population trend Increasing
Distribution size (breeding/resident) 4 km2
Country endemic? Yes
Links to further information
- Summary information on this species