Olive Long-tailed Cuckoo (Cercococcyx olivinus)

Olive Long-tailed Cuckoo Cercococcyx olivinus

Current view: Data table and detailed info

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
-	-	-

Red List history

Year	Category	Criteria
2024	Least Concern
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

Species attributes

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

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	5,200,000 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	4.15 years	-	-	-

Population justification: The global population size has not been quantified, but the species is reported to be uncommon in Nigeria (del Hoyo et al. 1997). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 8.8% within its mapped range over the past three generations (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Resident
Angola	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	extant	native	yes
Liberia	extant	native	yes
Nigeria	extant	native	yes
Sierra Leone	extant	native	yes
Uganda	extant	native	yes
Zambia	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Angola	Camabatela
Cameroon	Bakossi mountains
Cameroon	Campo Ma'an complex
Cameroon	Dja Faunal Reserve
Cameroon	Korup National Park
Cameroon	Lobéké National Park
Cameroon	Mbam Djerem National Park
Cameroon	Mont Manengouba
Cameroon	Mont Nlonako
Cameroon	Mount Cameroon and Mokoko-Onge
Cameroon	Mount Kupe
Cameroon	Mount Rata and Rumpi Hills Forest Reserve
Cameroon	Nki
Central African Republic	Dzanga-Ndoki National Park
Central African Republic	Ngotto
Congo	Conkouati National Park
Congo	Dimonika Biosphere Reserve
Congo	Lake Télé Community Reserve
Congo	Léfini Faunal Reserve
Congo	Lower Kouilou basin
Congo	Nouabalé-Ndoki National Park complex
Congo	Odzala National Park complex
Congo	Ogooué Leketi National Park
Congo, The Democratic Republic of the	Itombwe Mountains
Congo, The Democratic Republic of the	Lomako - Yekokora
Congo, The Democratic Republic of the	Ngiri
Congo, The Democratic Republic of the	Okapi Faunal Reserve
Congo, The Democratic Republic of the	Salonga 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	Yapo and Mambo Forest Reserves
Equatorial Guinea	Monte Alen National Park
Gabon	Ipassa Strict Nature Reserve
Gabon	Léconi grasslands
Gabon	Lopé Faunal Reserve
Gabon	Minkébé Forest Reserve
Ghana	Atewa Range Forest Reserve
Ghana	Bosomtwe Range Forest Reserve
Ghana	Nsuensa-Ayiola-Bediako Forest Reserves
Ghana	Pra-Sushien Forest Reserve
Ghana	Tano-Anwia Forest Reserve
Ghana	Tano-Offin Forest Reserve
Guinea	Massif du Ziama
Guinea	Monts Nimba (part of Mount Nimba transboundary AZE)
Liberia	Grebo
Liberia	Lofa-Gola-Mano Complex
Liberia	Nimba mountains
Liberia	Wologizi mountains
Liberia	Zwedru
Nigeria	Afi River Forest Reserve
Nigeria	Cross River National Park (Oban Division)
Sierra Leone	Gola Forests
Uganda	Budongo Forest Reserve
Uganda	Bugoma Central Forest Reserve
Uganda	Bwindi Impenetrable National Park
Uganda	Kasyoha-Kitomi Forest Reserve
Uganda	Kibale National Park
Uganda	Semliki National Park
Zambia	Hillwood
Zambia	Jimbe Drainage
Zambia	Source of the Zambezi

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Artificial/Terrestrial	Subtropical/Tropical Heavily Degraded Former Forest	suitable	resident
Forest	Subtropical/Tropical Moist Lowland	major	resident
Altitude	0 - 2000 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Olive Long-tailed Cuckoo Cercococcyx olivinus. Downloaded from https://datazone.birdlife.org/species/factsheet/olive-long-tailed-cuckoo-cercococcyx-olivinus on 22/11/2024.
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 22/11/2024.