VU
Yellow-casqued Hornbill Ceratogymna elata



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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - A2cd+3cd+4cd

Red List history
Year Category Criteria
2016 Vulnerable A2cd+3cd+4cd
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 continent
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 1,880,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 8000-9000 mature individuals poor estimated 2007
Population trend decreasing medium suspected 1993-2040
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 15.8 years - - -

Population justification: Recent calculations put the species's area of suitable habitat at 35,808 km2, and mean population density at 0.35 birds/km2. This gives an estimated population size of 12,533 individuals (H. Rainey in litt. 2007), here rounded to 12,500 individuals. This roughly equates to 8,000-9,000 mature individuals.

Trend justification: Observations on the prevalence of high hunting pressure and habitat loss, and the apparent disappearance of the species from some areas, strongly suggest that it is experiencing a rapid population decline.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Cameroon extant native yes
Côte d'Ivoire extant native yes
Ghana extant native yes
Guinea extant native yes
Guinea-Bissau extant native yes
Liberia extant native yes
Mali extant native yes
Nigeria extant native yes
Senegal extant native yes
Sierra Leone extant native yes
Togo possibly extinct native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Cameroon Bakossi mountains
Cameroon Banyang Mbo Wildlife Sanctuary
Cameroon Korup National Park
Cameroon Mont Nlonako
Cameroon Mount Cameroon and Mokoko-Onge
Cameroon Mount Rata and Rumpi Hills Forest Reserve
Cameroon Yabassi
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 Mount Nimba Strict Nature 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
Ghana Ankasa Resource Reserve - Nini-Sushien National Park
Ghana Bia National Park and Resource Reserve
Ghana Cape Three Points Forest Reserve
Ghana Draw River Forest Reserve
Ghana Ebi River Shelterbelt Forest Reserve
Ghana Fure River Forest Reserve
Ghana Kakum National Park - Assin Attandaso Resource Reserve
Ghana Pra-Sushien Forest Reserve
Ghana Subri River Forest Reserve
Guinea Diécké
Guinea Kounounkan
Guinea Massif du Ziama
Guinea-Bissau Cantanhez forests
Guinea-Bissau Lagoas de Cufada
Guinea-Bissau Rio Tombali, Rio Cumbijã and Ilha de Melo
Liberia Cestos - Senkwen
Liberia Grebo
Liberia Lofa-Gola-Mano Complex
Liberia Nimba mountains
Liberia Sapo
Liberia Wologizi mountains
Liberia Wonegizi mountains
Liberia Zwedru
Nigeria Afi River Forest Reserve
Nigeria Cross River National Park (Oban Division)
Nigeria Okomu National Park
Nigeria Omo Forest Reserve
Senegal Parc National de Basse Casamance
Sierra Leone Gola Forests
Sierra Leone Kambui Hills Forest Reserve
Sierra Leone Kangari Hills Non-hunting Forest Reserve
Sierra Leone Loma Mountains Non-hunting Forest Reserve
Sierra Leone Outamba-Kilimi National Park
Sierra Leone Tingi Hills Non-hunting Forest Reserve
Sierra Leone Western Area Peninsula Forest National Park
Togo Fazao-Malfakassa National Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 1000 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
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, 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
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Majority (50-90%) Slow, Significant Declines Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Yellow-casqued Hornbill Ceratogymna elata. Downloaded from https://datazone.birdlife.org/species/factsheet/yellow-casqued-hornbill-ceratogymna-elata 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.