Taxonomic note
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. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | B1ab(iii,v); C2a(i) |
Year | Category | Criteria |
---|---|---|
2016 | Vulnerable | B1ab(iii,v);C2a(i) |
2013 | Vulnerable | B1ab(iii,v);C2a(i) |
2012 | Vulnerable | B1ab(iii,v);C2a(i) |
2008 | Endangered | B1a+b(iii,v) |
2004 | Endangered | |
2000 | Endangered | |
1996 | Endangered | |
1994 | Endangered | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | Medium |
Land mass type |
Land-mass type - continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 18,200 | medium |
Number of locations | 6-10 | - |
Fragmentation | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 1500-7000 | poor | estimated | 2000 |
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) | 1-9 | - | - | - |
Decline (10 years/3 generation past and future) | 1-9 | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Largest subpopulations | 1-89 | - | - | - |
Generation length (yrs) | 3.5 | - | - | - |
Population justification: The population is estimated to number 2,500-9,999 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size, and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied. This estimate is equivalent to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals.
Trend justification: A slow and ongoing population decline is suspected, owing to rates of habitat loss.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Colombia | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
Colombia | Bosques del Oriente de Risaralda |
Colombia | Cuenca del Río Toche |
Colombia | Páramos y Bosques Altoandinos de Génova |
Colombia | Reserva Forestal Protectora CHEC |
Colombia | Reserva Hidrográfica, Forestal y Parque Ecológico de Río Blanco |
Colombia | Alto Quindío |
Colombia | Reservas Comunitarias de Roncesvalles |
Colombia | Reserva Natural Ibanasca |
Colombia | Reserva Natural Río Ñambí |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Plantations | suitable | resident |
Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 1800 - 3140 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 | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Residential & commercial development | Housing & urban areas | Timing | Scope | Severity | Impact | ||||
Past, Unlikely to Return | Majority (50-90%) | Negligible declines | Past Impact | ||||||
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Recommended citation
BirdLife International (2021) Species factsheet: Grallaria milleri. Downloaded from
http://www.birdlife.org on 16/01/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 16/01/2021.