• 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
2024	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	not a migrant	Forest dependency	high
Land-mass type		Average mass	-

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	3,810,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	4.38 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as common in larger tracts of forest (del Hoyo et al. 1992). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 7.5% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being 5-9%.

Trend justification:   .

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Angola	extant	native	yes
Cameroon	extant	native	yes
Central African Republic	extant	native	yes
Congo	extant	native	yes
Congo, The Democratic Republic of the	extant	native	yes
Equatorial Guinea	extant	native	yes
Gabon	extant	native	yes
Nigeria	extant	native	yes
Uganda	extant	native	yes

Country/Territory	IBA Name
Cameroon	Bakossi mountains
Cameroon	Banyang Mbo Wildlife Sanctuary
Cameroon	Boumba - Bek
Cameroon	Campo Ma'an complex
Cameroon	Korup National Park
Cameroon	Lobéké National Park
Cameroon	Mbam Djerem National Park
Cameroon	Mbam Minkom - Kala
Cameroon	Mont Nlonako
Cameroon	Mount Cameroon and Mokoko-Onge
Cameroon	Mount Kupe
Cameroon	Nki
Cameroon	Yabassi
Central African Republic	Dzanga-Ndoki National Park
Congo	Dimonika Biosphere Reserve
Congo	Odzala National Park complex
Congo, The Democratic Republic of the	Forests west of Lake Edward
Congo, The Democratic Republic of the	Itombwe Mountains
Congo, The Democratic Republic of the	Kahuzi-Biega National Park
Congo, The Democratic Republic of the	Lomako - Yekokora
Congo, The Democratic Republic of the	Luki Forest Reserve
Congo, The Democratic Republic of the	Maiko National Park
Congo, The Democratic Republic of the	Mount Hoyo Reserve
Congo, The Democratic Republic of the	Ngiri
Congo, The Democratic Republic of the	Okapi Faunal Reserve
Congo, The Democratic Republic of the	Salonga National Park
Congo, The Democratic Republic of the	Virunga National Park
Equatorial Guinea	Monte Alen National Park
Gabon	Gamba Protected Areas Complex
Gabon	Ipassa Strict Nature Reserve
Gabon	Lopé Faunal Reserve
Gabon	Minkébé Forest Reserve
Nigeria	Cross River National Park (Oban Division)
Nigeria	Cross River National Park (Okwangwo Division) and Mbe Mountains
Nigeria	Kagoro - Nindam Forest Reserves and vicinity
Nigeria	Okomu National Park
Uganda	Semliki National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 750 m	Occasional altitudinal limits

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Chestnut-flanked Sparrowhawk Accipiter castanilius. Downloaded from https://datazone.birdlife.org/species/factsheet/chestnut-flanked-sparrowhawk-accipiter-castanilius 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.