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

Taxonomic note

Geokichla crossleyi (del Hoyo and Collar 2016) was previously listed as Zoothera crossleyi.

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
-	-	-

Red List history

Year	Category	Criteria
2021	Least Concern
2016	Near Threatened	A3c
2014	Near Threatened	A3c
2012	Near Threatened	B1ab(i,ii,iii)
2008	Near Threatened	B1a+b(i,ii,iii)
2004	Near Threatened
2000	Lower Risk/Near Threatened
1994	Lower Risk/Near Threatened
1988	Lower Risk/Least Concern

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	2,120,000 km2	medium
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	inferred	2016-2027
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)	1-15%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-15%	-	-	-
Generation length	3.53 years	-	-	-

Population justification: The global population size has not been quantified, but the species is described as rare to locally fairly common (del Hoyo et al. 2005).

Trend justification: The population is inferred to be declining owing to ongoing habitat loss and fragmentation. The likely rate of decline however is suspected to be <20% over three generations (Global Forest Watch 2020).

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Cameroon	extant	native	yes
Congo	extant	native	yes
Congo, The Democratic Republic of the	extant	native	yes
Nigeria	extant	native	yes

Country/Territory	IBA Name
Cameroon	Bakossi mountains
Cameroon	Banyang Mbo Wildlife Sanctuary
Cameroon	Mont Manengouba
Cameroon	Mont Nlonako
Cameroon	Mount Cameroon and Mokoko-Onge
Cameroon	Mount Kupe
Cameroon	Mount Rata and Rumpi Hills Forest Reserve
Cameroon	Tchabal-Mbabo
Congo	Dimonika Biosphere Reserve
Nigeria	Gashaka-Gumti National Park
Nigeria	Ngel-Nyaki Forest Reserve
Nigeria	Obudu Plateau

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Wetlands (inland)	Permanent Rivers/Streams/Creeks (includes waterfalls)	suitable	resident
Altitude	500 - 2300 m	Occasional altitudinal limits

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%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture	Annual & perennial non-timber crops - Small-holder farming	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Negligible declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion
Biological resource use	Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Crossley's Ground-thrush Geokichla crossleyi. Downloaded from https://datazone.birdlife.org/species/factsheet/crossleys-ground-thrush-geokichla-crossleyi 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.