• 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
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 (km2)	7,210,000	medium
Severely fragmented?	no	-

	Value	Data quality	Derivation	Year of estimate
Number of mature individuals	unknown	not applicable	not applicable	0
Population trend	unknown		not applicable	-
Generation length (years)	19	-	-	-

Population justification: The global population size has not been quantified, but the species is reported to be locally uncommon to common (del Hoyo et al. 2001).

Country/Territory	Presence	Origin	Resident	Breeding	Non-breeding	Passage
Angola	extant	native	yes
Burundi	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
Côte d'Ivoire	extant	native	yes
Equatorial Guinea	extant	native	yes
Gabon	extant	native	yes
Ghana	extant	native	yes
Guinea-Bissau	extant	native	yes
Kenya	extant	native	yes
Liberia	extant	native	yes
Nigeria	extant	native	yes
Rwanda	extant	native	yes
Sierra Leone	extant	native	yes
South Sudan	extant	native	yes
Sudan	extant	native	yes
Tanzania	extant	native	yes
Togo	extant	native	yes
Uganda	extant	native	yes

Country/Territory	IBA Name
Angola	Cuango
Angola	Luachimo River (Chitato)
Benin	Ouémé river basin
Congo, The Democratic Republic of the	Itombwe Mountains
Central African Republic	Bamingui-Bangoran National Park complex
Central African Republic	Bangui
Central African Republic	Dzanga-Ndoki National Park
Congo	Nouabalé-Ndoki National Park complex
Congo	Odzala National Park complex
Côte d'Ivoire	Sangbe Mountain National Park
Côte d'Ivoire	Mount Nimba Strict Nature Reserve
Côte d'Ivoire	Gueoule and Glo Mountain Forest Reserves
Côte d'Ivoire	Peko Mountain National Park
Côte d'Ivoire	Marahoue National Park
Côte d'Ivoire	Bossematie Forest Reserve
Cameroon	Mbam Djerem National Park
Cameroon	Korup National Park
Cameroon	Bakossi mountains
Cameroon	Dja Faunal Reserve
Cameroon	Boumba - Bek
Cameroon	Campo Ma'an complex
Cameroon	Lobéké National Park
Gabon	Lopé Faunal Reserve
Gabon	Ipassa Strict Nature Reserve
Gabon	Minkébé Forest Reserve
Ghana	Ankasa Resource Reserve - Nini-Sushien National Park
Ghana	Bia National Park and Resource Reserve
Ghana	Boin Tano Forest Reserve
Ghana	Kakum National Park - Assin Attandaso Resource Reserve
Ghana	Nsuensa Forest Reserve
Ghana	Pra-Sushien Forest Reserve
Equatorial Guinea	Monte Alen National Park
Equatorial Guinea	Nsork Highlands National Park
Guinea-Bissau	Lagoas de Cufada
Kenya	North Nandi forest
Kenya	South Nandi forest
Kenya	Kakamega forest
Liberia	Zwedru
Nigeria	Okomu National Park
Nigeria	Cross River National Park (Oban Division)
Nigeria	Omo Forest Reserve
Nigeria	Kagoro - Nindam Forest Reserves and vicinity
Rwanda	Nyungwe National Park
South Sudan	Bengangai
Sierra Leone	Tingi Hills Non-hunting Forest Reserve
Tanzania	Minziro Forest Reserve
Uganda	Bwindi Impenetrable National Park
Uganda	Kibale National Park
Uganda	Queen Elizabeth National Park and Lake George
Uganda	Semliki National Park
Uganda	Mabira Forest Reserve
Uganda	Sango Bay area
Uganda	Budongo Forest Reserve
Uganda	Mount Elgon National Park
Congo	Ntokou Pikounda Reserve
Congo	Lake Télé Community Reserve
Congo	Ogooué Leketi National Park
Uganda	Bugoma Central Forest Reserve

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	suitable	resident
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Savanna	Dry	suitable	resident
Altitude	0 - 2600 m	Occasional altitudinal limits

Purpose	Primary form used	Life stage used	Source	Scale	Level	Timing
Food - human	-	-			non-trivial	recent
Pets/display animals, horticulture	-	-		international	non-trivial	recent

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Recommended citation
BirdLife International (2023) Species factsheet: Bycanistes subcylindricus. Downloaded from http://datazone.birdlife.org/species/factsheet/grey-cheeked-hornbill-bycanistes-subcylindricus on 04/10/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 04/10/2023.