Data Zone
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 |
|---|---|---|
| C2a(i,ii); D | B1ab(i,ii,iii,v); C2a(i,ii); D | B1ab(i,ii,iii,v); C2a(i,ii); D1+2 |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Critically Endangered | C2a(i,ii); D |
| 2016 | Critically Endangered | C2a(i,ii);D |
| 2012 | Critically Endangered | C2a(i,ii);D |
| 2009 | Critically Endangered | C2a(ii); D1 |
| 2008 | Critically Endangered | |
| 2004 | Endangered | |
| 2000 | Endangered | |
| 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) | 500 km2 | medium |
| Number of locations | 1 | - |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 1-49 mature individuals | poor | estimated | 2007 |
| Population trend | decreasing | poor | inferred | 1999-2009 |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 1-19% | - | - | - |
| Rate of change over the future 10 years/3 generations (longer of the two periods) | 1-19% | - | - | - |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 1-19% | - | - | - |
| Generation length | 3.5 years | - | - | - |
| Number of subpopulations | 1 | - | - | - |
| Percentage of mature individuals in largest subpopulation | 100% | - | - | - |
Population justification: The population is precautionarily estimated to number fewer than 50 individuals and mature individuals, for consistency with other species of similar status.
Trend justification: The population is considered to be in decline (suspected at a rate of 1-19% over ten years), owing to ongoing habitat degradation in the region. This part of the Andes is one of the most seriously threatened by deforestation for agriculture (Sharpe and Lentino 2008, 2015).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Venezuela | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Venezuela | Parque Nacional El Tamá |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Altitude | 1800 - 2100 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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Recommended citation
BirdLife International (2024) Species factsheet: Tachira Antpitta Grallaria chthonia. Downloaded from
https://datazone.birdlife.org/species/factsheet/tachira-antpitta-grallaria-chthonia on 21/12/2024.
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 21/12/2024.