• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note

Horizocerus albocristatus and H. cassini (del Hoyo and Collar 2014) were previously placed in the genus Tropicranus and lumped as T. albocristatus following Sibley and Monroe (1990, 1993)

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Least Concern
2014	Least Concern

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

	Estimate	Data quality
Extent of Occurrence breeding/resident (km2)	3,250,000	medium
Number of locations		-
Severely Fragmented		-

	Value	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)		-	-	-
Decline (10 years/3 generation past and future)		-	-	-
Number of subpopulations		-	-	-
Percentage in largest subpopulation		-	-	-
Generation length (yrs)	8	-	-	-

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

Trend justification: It is an adaptable species, which tolerates logging and forest degradation and occurs in cocoa and coffee plantations with mature forest trees. Nevertheless it is still suspected to be experiencing some declines.

Country/Territory	Occurrence status	Presence	Resident	Breeding	Non-breeding	Passage
Angola	N	Extant	Yes
Cameroon	N	Extant	Yes
Central African Republic	N	Extant	Yes
Congo	N	Extant	Yes
Congo, The Democratic Republic of the	N	Extant	Yes
Equatorial Guinea	N	Extant	Yes
Gabon	N	Extant	Yes
Nigeria	N	Extant	Yes
Uganda	N	Extant	Yes

Country/Territory	IBA Name
Angola	Luachimo River (Chitato)
Angola	Maiombe
Congo, The Democratic Republic of the	Luki Forest Reserve
Congo, The Democratic Republic of the	Ngiri
Congo, The Democratic Republic of the	Salonga National Park
Congo, The Democratic Republic of the	Lomako - Yekokora
Congo, The Democratic Republic of the	Mount Hoyo Reserve
Congo, The Democratic Republic of the	Okapi Faunal Reserve
Congo, The Democratic Republic of the	Virunga National Park
Congo, The Democratic Republic of the	Maiko National Park
Congo, The Democratic Republic of the	Forests west of Lake Edward
Congo, The Democratic Republic of the	Kahuzi-Biega National Park
Congo, The Democratic Republic of the	Itombwe Mountains
Central African Republic	Bangui
Central African Republic	Ngotto
Central African Republic	Dzanga-Ndoki National Park
Congo	Nouabalé-Ndoki National Park complex
Congo	Odzala National Park complex
Congo	Léfini Faunal Reserve
Congo	Dimonika Biosphere Reserve
Congo	Lower Kouilou basin
Congo	Conkouati National Park
Cameroon	Mbam Djerem National Park
Cameroon	Banyang Mbo Wildlife Sanctuary
Cameroon	Santchou Faunal Reserve
Cameroon	Korup National Park
Cameroon	Mont Manengouba
Cameroon	Bakossi mountains
Cameroon	Mont Nlonako
Cameroon	Mount Kupe
Cameroon	Yabassi
Cameroon	Mount Cameroon and Mokoko-Onge
Cameroon	Mbam Minkom - Kala
Cameroon	Dja Faunal Reserve
Cameroon	Boumba - Bek
Cameroon	Campo Ma'an complex
Cameroon	Nki
Cameroon	Lobéké National Park
Gabon	Gamba Protected Areas Complex
Gabon	Lopé Faunal Reserve
Gabon	Ipassa Strict Nature Reserve
Gabon	Minkébé Forest Reserve
Gabon	Ogooué delta and Mandji island
Equatorial Guinea	Monte Alen National Park
Equatorial Guinea	Nsork Highlands National Park
Nigeria	Afi River Forest Reserve
Nigeria	Okomu National Park
Nigeria	Cross River National Park (Oban Division)
Nigeria	Omo Forest Reserve
Nigeria	Cross River National Park (Okwangwo Division) and Mbe Mountains
Nigeria	IITA Forest Reserve, Ibadan
Nigeria	Upper Orashi forests
Nigeria	Ebok-Kabaken
Uganda	Semliki National Park
Congo	Lake Télé Community Reserve
Congo	Ogooué Leketi National Park

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Dry	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	suitable	resident
Altitude	0 - 1500 m	Occasional altitudinal limits

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

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Recommended citation
BirdLife International (2023) Species factsheet: Horizocerus cassini. Downloaded from http://www.birdlife.org on 27/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/03/2023.