EN
Jocotoco Antpitta Grallaria ridgelyi



Taxonomy

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.

IUCN Red List criteria met and history
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
Species attributes

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

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Ecuador Parque Nacional Podocarpus
Ecuador Tapichalaca Reserve (Reserva Tapichalaca IBA)

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

Threats & impact
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

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