• 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
-	-	A2cd+3cd+4cd

Red List history

Year	Category	Criteria
2018	Vulnerable	A2cd+3cd+4cd
2016	Vulnerable	A2cd+3cd
2012	Vulnerable	A2cd+3cd+4cd
2008	Near Threatened	A2c,d; A3c,d; A4c,d
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	556,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	1989-2046
Rate of change over the past 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	30-49%	-	-	-
Generation length	19 years	-	-	-
Percentage of mature individuals in largest subpopulation	100%	-	-	-

Population justification: The population size of this species has not been quantified.

Trend justification: The population is suspected to be in rapid decline owing to the destruction and degradation of its habitats and unsustainable hunting pressure.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Côte d'Ivoire	extant	native	yes
Ghana	extant	native	yes
Guinea	extant	native	yes
Liberia	extant	native	yes
Sierra Leone	extant	native	yes
Togo	extant	native	yes

Country/Territory	IBA Name
Côte d'Ivoire	Azagny National Park
Côte d'Ivoire	Bossematie Forest Reserve
Côte d'Ivoire	Gueoule and Glo Mountain Forest Reserves
Côte d'Ivoire	Marahoue National Park
Côte d'Ivoire	Mopri Forest Reserve
Côte d'Ivoire	Parc National de Taï et Réserve de faune du N'Zo
Côte d'Ivoire	Peko Mountain National Park
Côte d'Ivoire	Sangbe Mountain National Park
Côte d'Ivoire	Yapo and Mambo Forest Reserves
Ghana	Ankasa Resource Reserve - Nini-Sushien National Park
Ghana	Bia National Park and Resource Reserve
Ghana	Bosomtwe Range Forest Reserve
Ghana	Draw River Forest Reserve
Ghana	Kakum National Park - Assin Attandaso Resource Reserve
Ghana	Nsuensa-Ayiola-Bediako Forest Reserves
Ghana	Pra-Sushien Forest Reserve
Ghana	Subri River Forest Reserve
Ghana	Tano-Ehuro Forest Reserve
Ghana	Tano-Nimiri Forest Reserve
Guinea	Massif du Ziama
Liberia	Cestos - Senkwen
Liberia	Grebo
Liberia	Lofa-Gola-Mano Complex
Liberia	Nimba mountains
Liberia	Sapo
Liberia	Wologizi mountains
Liberia	Wonegizi mountains
Liberia	Zwedru
Sierra Leone	Gola Forests
Sierra Leone	Kangari Hills Non-hunting Forest Reserve
Sierra Leone	Loma Mountains Non-hunting Forest Reserve
Uganda	Budongo Forest Reserve
Uganda	Bwindi Impenetrable National Park
Uganda	Kibale National Park
Uganda	Queen Elizabeth National Park and Lake George
Uganda	Semliki National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Plantations	marginal	resident
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	marginal	unknown
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	0 - 4054 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
Agriculture & aquaculture	Annual & perennial non-timber crops - Agro-industry farming	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Slow, Significant Declines		Low Impact: 4
		Stresses Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Hunting & trapping terrestrial animals - Intentional use (species is the target)	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species mortality
Biological resource use	Logging & wood harvesting - Unintentional effects: (large scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation

Purpose	Scale
Food - human	subsistence, national
Pets/display animals, horticulture	international

---

Recommended citation
BirdLife International (2024) Species factsheet: Brown-cheeked Hornbill Bycanistes cylindricus. Downloaded from https://datazone.birdlife.org/species/factsheet/brown-cheeked-hornbill-bycanistes-cylindricus on 23/12/2024.
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 23/12/2024.