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

Taxonomic note
Spilornis minimus (Sibley and Monroe 1990, 1993) has been split into S. klossi with the remainder (i.e. nominate minimus) lumped with S. cheela (Sibley and Monroe 1990, 1993) following Rasmussen and Anderton (2005).

Taxonomic source(s)
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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2002	Least Concern
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	19,100,000 km2	medium
Extent of Occurrence (non-breeding)	18,000,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	stable	-	suspected	-
Generation length	12.9 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as widespread and common, although locally uncommon (del Hoyo et al. 1992).

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Bangladesh	extant	native		yes
Bhutan	extant	native		yes
Brunei	extant	native		yes
Cambodia	extant	native		yes
China (mainland)	extant	native		yes
Hong Kong (China)	extant	native	yes
India	extant	native		yes
Indonesia	extant	native		yes
Japan	extant	native		yes
Laos	extant	native		yes
Macao (China)	extant	native	yes
Malaysia	extant	native		yes
Myanmar	extant	native		yes
Nepal	extant	native		yes
Pakistan	extant	native		yes
Philippines	extant	native		yes
Singapore	extant	vagrant			yes
South Korea	extant	vagrant			yes
Sri Lanka	extant	native		yes
Taiwan, China	extant	native		yes
Thailand	extant	native		yes
Vietnam	extant	native		yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Arable Land	suitable	resident
Artificial/Terrestrial	Plantations	suitable	resident
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Mangrove Vegetation Above High Tide Level	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	suitable	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Marine Neritic	Estuaries	suitable	resident
Savanna	Dry	suitable	resident
Altitude	0 - 2000 m	Occasional altitudinal limits	(max) 3350 m

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Crested Serpent-eagle Spilornis cheela. Downloaded from https://datazone.birdlife.org/species/factsheet/crested-serpent-eagle-spilornis-cheela on 04/12/2024.
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 04/12/2024.