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.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2022 | Least Concern | |
2016 | Near Threatened | A2c+3c+4c;B1ab(i,ii,iii,v);C1+2a(i) |
2012 | Near Threatened | A2c+3c+4c;B1ab(i,ii,iii,v);C1+2a(i) |
2008 | Near Threatened | A2c; A3c; A4c; B1a+b(i,ii,iii,v); C1; C2a(i) |
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) | 92,600 km2 | medium |
Area of Occupancy (breeding/resident) | 24,000 km2 | |
Number of locations | 11-100 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 10000-19999 mature individuals | poor | inferred | 2022 |
Population trend | decreasing | poor | suspected | 2016-2028 |
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 | 3.9 years | - | - | - |
Number of subpopulations | 5-100 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The global population size has not been quantified, but this species is described as 'uncommon' (Stotz et al. 1996). Tentatively assuming that the species occurs at the same density as a congener (G. varia: 3 mature individuals/km2; Santini et al. 2018) and further assuming that 25% of forested habitat within the range is occupied to account for its rarity (i.e., c. 4,500 km2), the population may number 13,500 mature individuals. To account for uncertainty, it is here placed in the band 10,000-19,999 mature individuals, but an exact population estimate is urgently required.
Trend justification: The species is feared to be in slow decline as a consequence of habitat loss and degradation. Within the range, tree cover is lost at a rate of 2% over three generations (11.7 years; Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). As the species appears to show at least some tolerance of secondary growth (see Schulenberg and Kirwan 2021), population declines are unlikely to be fast; they are here tentatively placed in the band 1-9% over three generations.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Peru | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Peru | Abra Patricia - Alto Mayo |
Peru | Cordillera de Colán |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 1560 - 3580 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 | Majority (50-90%) | Causing/Could cause fluctuations | Medium Impact: 6 | ||||||
|
|||||||||
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Causing/Could cause fluctuations | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Chestnut Antpitta Grallaria blakei. Downloaded from
https://datazone.birdlife.org/species/factsheet/chestnut-antpitta-grallaria-blakei 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.