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

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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2021	Least Concern
2016	Least Concern
2012	Least Concern
2009	Least Concern
2008	Least Concern
2004	Least Concern
2000	Lower Risk/Least Concern
1994	Lower Risk/Least Concern
1988	Lower Risk/Least Concern

Migratory status	full migrant	Forest dependency	low
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	23,300,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	6700-67000 mature individuals	poor	suspected	2009
Population trend	decreasing	-	suspected	-
Generation length	9.13 years	-	-	-

Population justification: Ferguson-Lees and Christie (2001) estimated the global population to be c.10,000-100,000 individuals, which equates to 6,700-67,000 mature individuals.

Trend justification: The population is suspected to be decreasing in West Africa. Thiollay (2007) reported a decline in abundance outside protected areas in Burkina Faso, Mali, Niger and northern Cameroon during 1969-2004 from 1.4 birds/100 km to 0.2 birds/100 km, equating to an 80% reduction over three generations (27.39 years [Bird et al. 2020]). In contrast, surveys in northern Botswana during 1991-2016 showed a small but significant increase (18.1% over three generations) in the population, with a larger increase when considering only those occuring outside protected areas (Garbett et al. 2018). Preliminary results of analyses comparing the first and second Southern African Bird Atlas Project suggest that the species may be undergoing a range shift in this area (Underhill & Brooks 2014).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Angola	extant	native	yes
Benin	extant	native	yes
Botswana	extant	native	yes
Burkina Faso	extant	native	yes
Burundi	extant	native	yes
Cameroon	extant	native	yes
Central African Republic	extant	native	yes
Chad	extant	native	yes
Congo, The Democratic Republic of the	extant	native	yes
Côte d'Ivoire	extant	native	yes
Eritrea	extant	native	yes
Eswatini	extant	native	yes
Ethiopia	extant	native	yes
Gambia	extant	native	yes
Ghana	extant	native	yes
Guinea	extant	native	yes
Guinea-Bissau	extant	native	yes
Kenya	extant	native	yes
Liberia	extant	native	yes
Malawi	extant	native	yes
Mali	extant	native	yes
Mauritania	extant	native	yes
Mozambique	extant	native	yes
Namibia	extant	native	yes
Niger	extant	native	yes
Nigeria	extant	native	yes
Rwanda	extant	native	yes
Senegal	extant	native	yes
Sierra Leone	extant	native	yes
Somalia	extant	native	yes
South Africa	extant	native	yes
South Sudan	extant	native	yes
Sudan	extant	native	yes
Tanzania	extant	native	yes
Togo	extant	native	yes
Uganda	extant	native	yes
Zambia	extant	native	yes
Zimbabwe	extant	native	yes

Country/Territory	IBA Name

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Desert	Hot	suitable	resident
Forest	Subtropical/Tropical Dry	suitable	resident
Grassland	Subtropical/Tropical Dry	suitable	resident
Savanna	Dry	suitable	resident
Shrubland	Subtropical/Tropical Dry	suitable	resident
Altitude	0 - 3400 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Livestock farming & ranching - Small-holder grazing, ranching or farming	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality
Biological resource use	Hunting & trapping terrestrial animals - Unintentional effects (species is not the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation
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
Natural system modifications	Dams & water management/use - Dams (size unknown)	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		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality

Purpose	Scale
Medicine - human & veterinary	subsistence
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Brown Snake-eagle Circaetus cinereus. Downloaded from https://datazone.birdlife.org/species/factsheet/brown-snake-eagle-circaetus-cinereus on 22/11/2024.
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 22/11/2024.