• 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., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	C2a(i)

Red List history

Year	Category	Criteria
2021	Near Threatened	C2a(i)
2016	Vulnerable	C2a(i)
2014	Vulnerable	C2a(i)
2012	Vulnerable	C2a(i)
2008	Vulnerable	C2a(i)
2004	Vulnerable
2000	Vulnerable
1996	Vulnerable
1994	Vulnerable
1988	Threatened

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	522,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	2500-9999 mature individuals	medium	suspected	2000
Population trend	decreasing	medium	inferred	2008-2023
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-10%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-10%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-10%	-	-	-
Generation length	5.07 years	-	-	-
Number of subpopulations	8	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The total population is almost certainly less than 10,000 mature individuals (C. Bowden in litt. 1999; R. Fotso in litt. 1999; H. Thompson in litt. 2000). The suspected population size is therefore placed in the band 2,500-9,999 mature individuals.

Trend justification: This species is inferred to be declining overall. It has very specific habitat requirements (Atuo et al. 2016), and is experiencing continued habitat loss and degradation (Global Forest Watch 2020; Atuo et al. 2016) in addition to hunting pressure and disturbance (Atuo et al. 2016; Odiwumi & Abatcha 2018). The likely rate of decline has not been directly quantified, but is suspected to fall in the band of 1-10%.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cameroon	extant	native	yes
Central African Republic	extant	native	yes
Congo	extant	native	yes
Equatorial Guinea	extant	native	yes
Gabon	extant	native	yes
Nigeria	extant	native	yes

Country/Territory	IBA Name
Cameroon	Bakossi mountains
Cameroon	Banyang Mbo Wildlife Sanctuary
Cameroon	Boumba - Bek
Cameroon	Campo Ma'an complex
Cameroon	Dja Faunal Reserve
Cameroon	Korup National Park
Cameroon	Mbam Minkom - Kala
Cameroon	Mont Manengouba
Cameroon	Mont Nlonako
Cameroon	Mount Cameroon and Mokoko-Onge
Cameroon	Mount Kupe
Cameroon	Mount Rata and Rumpi Hills Forest Reserve
Cameroon	Yabassi
Equatorial Guinea	Luba Caldera Scientific Reserve
Equatorial Guinea	Monte Alen National Park
Equatorial Guinea	Nsork Highlands National Park
Gabon	Gamba Protected Areas Complex
Gabon	Lopé Faunal Reserve
Nigeria	Afi River Forest Reserve
Nigeria	Cross River National Park (Oban Division)
Nigeria	Cross River National Park (Okwangwo Division) and Mbe Mountains
Nigeria	Ebok-Kabaken

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	major	resident
Altitude	45 - 2100 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
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		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species disturbance, Species mortality
Biological resource use	Hunting & trapping terrestrial animals - Unintentional effects (species is not the target)	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species disturbance, Species mortality
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, Ecosystem conversion
Human intrusions & disturbance	Recreational activities	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species disturbance
Human intrusions & disturbance	Work & other activities	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Species disturbance
Invasive and other problematic species, genes & diseases	Problematic native species/diseases	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Unknown		Unknown
		Stresses Reduced reproductive success

Purpose	Scale
Pets/display animals, horticulture	international

---

Recommended citation
BirdLife International (2024) Species factsheet: Grey-necked Rockfowl Picathartes oreas. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-necked-rockfowl-picathartes-oreas on 25/11/2024.
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 25/11/2024.