Great Nicobar Serpent-eagle (Spilornis klossi)

Great Nicobar Serpent-eagle Spilornis klossi

Current view: Data table and detailed info

Taxonomy

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.

IUCN Red List criteria met and history

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Near Threatened	B1ab(ii,iii);C1
2012	Near Threatened	B1ab(ii,iii);C1
2008	Near Threatened	C1
2004	Near Threatened
2002	Near Threatened
2000	Not Recognised
1994	Not Recognised
1988	Not Recognised

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,700 km²	medium
Severely fragmented?	no	-

Population

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

Population justification: The global population size has not been quantified, but the species is described as common (Ferguson-Lees and Christie 2001).

Trend justification: A population decline, as yet unquantified, is suspected on the basis of rates of habitat loss and degradation.

Country/territory distribution

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

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 600 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

Minority (<50%)

Slow, Significant Declines

Low Impact: 5

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

Pollution

Agricultural & forestry effluents - Herbicides and pesticides

Timing

Scope

Severity

Impact

Ongoing

Majority (50-90%)

Unknown

Stresses
Species mortality

Residential & commercial development

Housing & urban areas

Timing

Scope

Severity

Impact

Future

Minority (<50%)

Slow, Significant Declines

Low Impact: 3

Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2023) Species factsheet: Spilornis klossi. Downloaded from http://datazone.birdlife.org/species/factsheet/great-nicobar-serpent-eagle-spilornis-klossi on 04/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 04/12/2023.