VU
Brown-cheeked Hornbill Bycanistes cylindricus



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

IUCN Red list criteria met and history
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
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 556,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Decreasing suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 30-49 - - -
Decline (10 years/3 generation past and future) 30-49 - - -
Number of subpopulations - - -
Largest subpopulations 100 - - -
Generation length (yrs) 19 - - -

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 distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Côte d'Ivoire N Extant Yes
Ghana N Extant Yes
Guinea N Extant Yes
Liberia N Extant Yes
Sierra Leone N Extant Yes
Togo N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Côte d'Ivoire Comoe National Park
Côte d'Ivoire Sangbe Mountain National Park
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
Côte d'Ivoire Parc National de Taï et Réserve de faune du N'Zo
Côte d'Ivoire Mopri Forest Reserve
Côte d'Ivoire Yapo and Mambo Forest Reserves
Côte d'Ivoire Azagny National Park
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 Forest Reserve
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 Wologizi mountains
Liberia Wonegizi mountains
Liberia Lofa-Gola-Mano Complex
Liberia Nimba mountains
Liberia Zwedru
Liberia Cestos - Senkwen
Liberia Sapo
Liberia Grebo
Sierra Leone Loma Mountains Non-hunting Forest Reserve
Sierra Leone Kangari Hills Non-hunting Forest Reserve
Sierra Leone Gola Forests
Uganda Bwindi Impenetrable National Park
Uganda Kibale National Park
Uganda Queen Elizabeth National Park and Lake George
Uganda Semliki National Park
Uganda Budongo Forest Reserve

Habitats & altitude
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  

Threats & impact
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

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2020) Species factsheet: Bycanistes cylindricus. Downloaded from http://www.birdlife.org on 05/08/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 05/08/2020.