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Guanay Cormorant Phalacrocorax bougainvilliorum

IUCN Red List Criteria

Near Threatened (criteria nearly met) A2cd+3cd+4cd 

IUCN Red List history

Year Category
2013 Near Threatened
2012 Near Threatened
2010 Near Threatened
2008 Near Threatened
2006 Near Threatened
2004 Near Threatened
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern

Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type shelf island
continent
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 466,000 medium
Extent of Occurrence non-breeding (km2) 599,000 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals medium Estimated 1996
Population trend Decreasing poor -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 11 - - -
Population justification: Zavalaga & Paredes (1999) estimated the population at 3.7 million individuals, hence the population is best placed in the band 2,500,000-4,999,999 individuals.
Trend justification: The species has fluctuated in numbers in the past, but overall declines in the region of 20-30% are suspected in the past three generations (33 years).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Argentina Native Possibly Extinct Yes      
Chile Native Extant Yes      
Colombia Vagrant Extant   Yes    
Ecuador Native Extant   Yes    
Panama Vagrant Extant   Yes    
Peru Native Extant Yes      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Argentina Punta Gutierrez - Bahía Camarones site factsheet
Argentina Punta León site factsheet
Chile Acantilados de Arica site factsheet
Chile Cuevas de Anzota site factsheet
Chile Desembocadura del Río Loa site factsheet
Chile Guaneras de Cutipa site factsheet
Chile Isla Mocha site factsheet
Chile Isla Santa María site factsheet
Chile Islote Concón site factsheet
Chile Islote Pupuya site factsheet
Chile Islotes Pajaros site factsheet
Chile Puaucho site factsheet
Chile Reserva Nacional Pingüino de Humboldt - Isla Choros, Damas y Punta de Choros site factsheet
Chile Santuario de la Naturaleza Rocas de Constitución site factsheet
Peru Isla Lobos de Afuera site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Marine Coastal/Supratidal Sea Cliffs and Rocky Offshore Islands suitable breeding
Marine Neritic Macroalgal/Kelp major resident
Marine Neritic Pelagic major resident
Marine Neritic Seagrass (Submerged) major resident
Marine Neritic Subtidal Loose Rock/pebble/gravel major resident
Marine Neritic Subtidal Rock and Rocky Reefs major resident
Marine Neritic Subtidal Sandy major resident
Marine Neritic Subtidal Sandy-Mud major resident
Marine Oceanic Epipelagic (0-200m) suitable resident
Marine Oceanic Mesopelagic (200-1000m) suitable resident
Altitude 0 - 0 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Fishing & harvesting aquatic resources / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Past, Likely to Return Majority (50-90%) Rapid Declines Past impact
Stresses
Indirect ecosystem effects, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals / Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Reduced reproductive success, Species mortality
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Past, Likely to Return Majority (50-90%) Slow, Significant Decline Past impact
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Reduced reproductive success
Natural system modifications Other ecosystem modifications Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation

Utilisation

Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - -  

Recommended citation
BirdLife International (2014) Species factsheet: Phalacrocorax bougainvilliorum. Downloaded from http://www.birdlife.org on 21/12/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/12/2014.

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 Near Threatened
Family Phalacrocoracidae (Cormorants)
Species name author (Lesson, 1837)
Population size mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 466,000 km2
Country endemic? No
Links to further information
- Summary information on this species