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: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| C2a(i); D | C2a(i); D | B1ab(iii,v); C2a(i); D1+2 |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Critically Endangered | C2a(i); D |
| 2016 | Critically Endangered | C2a(i); D |
| 2015 | Critically Endangered | C2a(i); D |
| 2012 | Critically Endangered | C2a(i);D |
| 2011 | Critically Endangered | C2a(i) |
| 2010 | Critically Endangered | C2a(i) |
| 2009 | Critically Endangered | C2a(ii); D1 |
| 2008 | Critically Endangered | |
| 2004 | Critically Endangered | |
| 2000 | Critically Endangered | |
| 1996 | Critically Endangered | |
| 1994 | Critically Endangered | |
| 1988 | Threatened |
| Migratory status | not a migrant | Forest dependency | Does not normally occur in forest |
| Land mass type |
Land-mass type - continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 13,000 | medium |
| Number of locations | 10 | - |
| Fragmentation | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 30-200 | good | observed | 2009 |
| Population trend | Decreasing | poor | suspected | - |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | 2-100 | - | - | - |
| Largest subpopulations | 1-89 | - | - | - |
| Generation length (yrs) | 3.9 | - | - | - |
Population justification: Surveys between 2004 and 2008 recorded 77 individuals. An approximate estimate based on these surveys and other records gives a total global population of 250 individuals (S. Valderrama in litt. 2010). However, until this is confirmed to be accurate, the population band of 50-249 individuals seems appropriate. This equates to 33-166 mature individuals, rounded here to 30-200 mature individuals.
Trend justification: The species is suspected to be in decline owing to the spread of agriculture near the type locality, and because of threats to its dry forest habitat, although the likely rate of decline has not been quantified.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Colombia | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Colombia | Bosques Secos del Valle del Río Chicamocha |
| Colombia | Soatá |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Shrubland | Subtropical/Tropical Dry | major | resident |
| Altitude | 800 - 2100 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 | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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Recommended citation
BirdLife International (2020) Species factsheet: Thryophilus nicefori. Downloaded from
http://www.birdlife.org on 12/07/2020.
Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 12/07/2020.
