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 |
|---|---|---|
| - | - | B1ab(i,ii,iii,v) |
| Year | Category | Criteria |
|---|---|---|
| 2019 | Vulnerable | B1ab(i,ii,iii,v) |
| 2016 | Endangered | B1ab(i,ii,iii,v) |
| 2013 | Endangered | B1ab(i,ii,iii,v) |
| 2012 | Endangered | B1ab(i,ii,iii,v) |
| 2008 | Endangered | B1a+b(i,ii,iii,v) |
| 2004 | Endangered | |
| 2000 | Endangered | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| 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) | 12,800 | medium |
| Number of locations | 6 | - |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 1500 | medium | inferred | 2019 |
| 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 | - | - | - |
| Percentage in largest subpopulation | 1-89 | - | - | - |
| Generation length (yrs) | 3.8 | - | - | - |
Population justification: Field surveys revealed a population density of 168 individuals/km2 (S. K. Herzog in litt. 2013). The area of mapped range covers c.1,390 km2. Assuming that only 1% of this area contains suitable habitat for the species, the extrapolation of the population size results in an estimate of c.2,330 individuals. This roughly equates to 1,500 mature individuals. Given the apparent rarity of the species near Sorata, the population estimate may need to be corrected if more recent survey data from the area becomes available.
Trend justification: As a consequence of the destruction and degradation of its habitat, the species is suspected to be undergoing a decline, the rate of which has not been directly estimated. A remote sensing study found that no forest was lost within the range over the last three generations (Tracewski et al. 2016). Apart from woodland, the species also occupies shrub and brushland (Remsen and Sharpe 2018), but there is no information about the rate of conversion of this habitat.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Bolivia | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Bolivia | Cuenca Cotacajes |
| Bolivia | Tacacoma-Quiabaya y Valle de Sorata |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Dry | major | resident |
| Shrubland | Subtropical/Tropical Dry | major | resident |
| Shrubland | Subtropical/Tropical High Altitude | major | resident |
| Altitude | 1800 - 3300 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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| Agriculture & aquaculture | Wood & pulp plantations - Agro-industry plantations | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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| 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 | ||||||
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Majority (50-90%) | Slow, Significant Declines | Low Impact: 4 | ||||||
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| Geological events | Avalanches/landslides | Timing | Scope | Severity | Impact | ||||
| Future | Majority (50-90%) | Very Rapid Declines | Medium Impact: 6 | ||||||
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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| Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Cranioleuca henricae. Downloaded from
http://www.birdlife.org on 20/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 20/03/2023.
