• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2024	Near Threatened	B1b(iii)
2016	Endangered	C2a(ii)
2012	Endangered	C2a(ii)
2008	Endangered	C2a(ii)
2004	Endangered
2000	Endangered
1996	Vulnerable
1994	Vulnerable
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	10,900 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	poor	-	-
Population trend	decreasing	poor	suspected	2005-2027
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	5.64 years	-	-	-
Number of subpopulations	1	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The population size has not been quantified but the species is described as uncommon in forest (Eaton et al. 2021). A lack of population data are available to give an accurate estimation of population size, however it is unlikely to be especially large due to its small range where it is found at low densities. However, records on eBird (2024) indicate that the species is regularly encountered at sites with good survey effort.

Trend justification: Corvus florensis inhabits forested areas in western Flores. With its reliance on forested areas it is probable that population declines are in line with rates of habitat loss. It is thought to be intolerant of total forest clearance, however it can tolerate forest degradation (Butchart et al. 1996). In the three generations (17 years) to 2023, tree cover in this species’ range declined by 3% (Global Forest Watch (2024) based on data from Hansen et al. (2013) and methods therein). Precautionarily, similar rates are suspected to occur in the future three generations. Because of this, the species is suspected to be declining at an ongoing rate of 1-9%.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Indonesia	extant	native	yes

Country/Territory	IBA Name
Indonesia	Komodo - Rinca
Indonesia	Mausambi
Indonesia	Mbeliling - Tanjung Kerita Mese
Indonesia	Nangarawa
Indonesia	Nggorang Bowosie
Indonesia	Sesok
Indonesia	Todo Repok
Indonesia	Wae Wuul
Indonesia	Wolo Tado

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 1000 m	Occasional altitudinal limits

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 Declines		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 Declines		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

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Recommended citation
BirdLife International (2024) Species factsheet: Flores Crow Corvus florensis. Downloaded from https://datazone.birdlife.org/species/factsheet/flores-crow-corvus-florensis on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.