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Flores Crow Corvus florensis

IUCN Red List Criteria

Critically Endangered  
Endangered C2a(ii) 
Vulnerable B1ab(ii,iii,v);C2a(i,ii) 

IUCN Red List history

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

Species attributes

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

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 9,100 medium
Number of locations 6-10 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 600-1700 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 1 - - -
Largest subpopulation 1000-2499 - - -
Generation length (yrs) 7.3 - - -
Population justification: The population is estimated to number 1,000-2,499 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals.
Trend justification: This species is suspected to be declining at a moderate rate, through forest loss and from the added pressure of brood parasitism by cuckoo-shrikes, Coracina spp.

Country/Territory distribution

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

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Indonesia Komodo site factsheet
Indonesia Mausambi (Keliwumbu) site factsheet
Indonesia Mbeliling (Tanjung Karita Mese) site factsheet
Indonesia Ndeki-Komba (dan Nangarawa) site factsheet
Indonesia Nggorang Bowosie site factsheet
Indonesia Sano Nggoang site factsheet
Indonesia Todo Repok site factsheet
Indonesia Wae Wuul site factsheet
Indonesia Wolo Tado site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 950 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Competition
Invasive and other problematic species, genes & diseases Problematic native species/diseases / Asian Koel (Eudynamys scolopacea) Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Reduced reproductive success
Invasive and other problematic species, genes & diseases Problematic native species/diseases / Channel-billed Cuckoo (Scythrops novaehollandiae) Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Reduced reproductive success

Recommended citation
BirdLife International (2014) Species factsheet: Corvus florensis. 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 Corvidae (Crows and jays)
Species name author Büttikofer, 1894
Population size 600-1700 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 9,100 km2
Country endemic? Yes
Links to further information
- Summary information on this species