VU
Masatierra Petrel Pterodroma defilippiana



Taxonomy

Taxonomic source(s)
Brooke, M. de L. 2004. Albatrosses and Petrels Across the World. Oxford University Press, Oxford.
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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - D2

Red List history
Year Category Criteria
2018 Vulnerable D2
2016 Vulnerable D2
2012 Vulnerable D2
2010 Vulnerable D2
2008 Vulnerable D2
2006 Vulnerable
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,900,000 medium
Extent of Occurrence breeding/resident (km2) 9 medium
Number of locations 3 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 5554 poor estimated 2004
Population trend Stable poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 3 - - -
Largest subpopulations - - -
Generation length (yrs) 15.6 - - -

Population justification: The world population may be no greater than 10,000 individuals. The estimate of global breeding population, based on on-the-ground counts of nests, is 2,777 breeding pairs (or 5,554 breeding individuals) (Hodum 2012).

Trend justification: The population is thought to be stable although the very small breeding range of the species renders it susceptible to stochastic events.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Chile N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Chile Valparaiso - pelagico
Chile Islas Desventuradas
Chile Parque Nacional Archipiélago de Juan Fernández: Islas Robinson Crusoe and Santa Clara
Chile San Antonio - Cañón submarino
Chile Costa de Quintero y Mar Adyacente (Pelagico)
Chile Isla Robinson Crusoe - Marine
Chile Isla Ambrosio - Marine

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands major breeding
Marine Intertidal Rocky Shoreline suitable breeding
Marine Neritic Pelagic major non-breeding
Marine Neritic Pelagic major breeding
Marine Oceanic Epipelagic (0-200m) major non-breeding
Marine Oceanic Epipelagic (0-200m) major breeding
Altitude   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 - Capra hircus Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Felis catus Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Named species Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Nasua nasua Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Species mortality

Recommended citation
BirdLife International (2020) Species factsheet: Pterodroma defilippiana. Downloaded from http://www.birdlife.org on 29/10/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/10/2020.