• Summary
• Text account
• Data table and detailed info
• Distribution map
• 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.
SACC. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	B1ab(iii)+2ab(iii)	B1ab(iii)+2ab(iii); D1+2

Red List history

Year	Category	Criteria
2021	Endangered	B1ab(iii)+2ab(iii)
2016	Endangered	B1ab(i,ii,iii,v);C2a(i)
2012	Endangered	B1ab(i,ii,iii,v);C2a(i)
2008	Endangered	B1a+b(i,ii,iii,v); C2a(i)
2004	Endangered
2000	Endangered
1994	Not Recognised
1988	Not Recognised

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

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,300 km2	medium
Area of Occupancy (breeding/resident)	252 km2
Number of locations	2-5	-
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	480-600 mature individuals	medium	estimated	2020
Population trend	decreasing	poor	suspected	2015-2030
Rate of change over the past 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Rate of change over the past & future 10 years/3 generations (longer of the two periods)	1-9%	-	-	-
Generation length	5 years	-	-	-
Number of subpopulations	4	-	-	-
Percentage of mature individuals in largest subpopulation	1-89%	-	-	-

Population justification: The population size is likely very small (M. Juiña in litt. 2020). At the type locality, the population density was estimated at 6-7.5 individuals/km² (per Greeney 2020). Assuming that the species is occurring at a similar density across its known range (covering an area of 120 km²), the global population is estimated at up to 720-900 individuals. This roughly equates to 480-600 mature individuals.
The subpopulation structure has not been formally assessed. Despite some juvenile dispersal, the species is otherwise sedentary and territorial (Greeney 2020); as such, the spatial spread of observational records and fragmentation of the range suggests that the species forms four separate subpopulations. Extrapolating the sizes of the four subpopulations based on the observed density of 6-7.5 individuals/km² indicates that the largest subpopulation may number c. 390-490 individuals, equating to c. 260-325 mature individuals, while the other three subpopulations may number around 110-140 individuals each, equating to c. 70-90 mature individuals.

Trend justification: Forests within the range are largely continuous (Freile et al. 2010). Nevertheless, parts of the range are threatened by logging, forest degradation and gold mining (Greeney 2020). Precautionarily, the population is suspected to undergo a decline, the rate of which unlikely exceeds 10% over three generations.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Ecuador	extant	native	yes
Peru	extant	native	yes

Country/Territory	IBA Name
Ecuador	Parque Nacional Podocarpus
Ecuador	Tapichalaca Reserve (Reserva Tapichalaca IBA)

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	2300 - 2680 m	Occasional altitudinal limits

Threat (level 1)	Threat (level 2)	Impact and Stresses
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	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
Energy production & mining	Mining & quarrying	Timing		Scope		Severity		Impact
		Ongoing		Majority (50-90%)		Slow, Significant Declines		Medium Impact: 6
		Stresses Ecosystem degradation, Ecosystem conversion
Transportation & service corridors	Roads & railroads	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Ecosystem conversion

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Recommended citation
BirdLife International (2024) Species factsheet: Jocotoco Antpitta Grallaria ridgelyi. Downloaded from https://datazone.birdlife.org/species/factsheet/jocotoco-antpitta-grallaria-ridgelyi 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.