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 |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2022 | Least Concern | |
| 2016 | Near Threatened | A2c+3c+4c |
| 2012 | Near Threatened | A2c+3c+4c |
| 2008 | Near Threatened | A2c; A3c; A4c |
| 2004 | Near Threatened | |
| 2000 | Lower Risk/Near Threatened | |
| 1994 | Lower Risk/Near Threatened | |
| 1988 | Near Threatened |
| Migratory status | not a migrant | Forest dependency | high |
| Land mass type |
land-mass type - continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 267,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | unknown | not applicable | not applicable | 0 |
| 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) | 1-19 | - | - | - |
| Decline (10 years/3 generation past and future) | 1-19 | - | - | - |
| Number of subpopulations | 10-100 | - | - | - |
| Percentage in largest subpopulation | 1-89 | - | - | - |
| Generation length (yrs) | 3.5 | - | - | - |
Population justification: The global population size has not been quantified. The species is described as uncommon to locally fairly common, but infrequently seen (Krabbe and Schulenberg 2020).
Trend justification: Information on population trends is lacking, but the species is suspected to be declining owing to continuing habitat loss and degradation.
Tree cover within the range is lost at a rate of 6% over three generations (10.5 years; Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). The species is restricted to forests, and as such population declines may be aggravated by the degradation of forested habitat. Therefore, the rate of population decline is tentatively placed in the band 1-19% over three generations.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Brazil | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Brazil | Estação Ecológica de Juréia-Itatins |
| Brazil | Guaraqueçaba / Jacupiranga / Cananéia |
| Brazil | Ilhabela State Park (Parque Estadual de Ilhabela IBA) |
| Brazil | Maciço Florestal de Paranapiacaba |
| Brazil | Parque Estadual da Serra do Mar (entre Caraguatatuba e Picinguaba) |
| Brazil | Parque Estadual da Serra do Mar (entre Santos e São Sebastião) |
| Brazil | Parque Nacional de Itatiaia |
| Brazil | Parque Nacional do Caparaó |
| Brazil | Salto do Piraí |
| Brazil | Serra da Bocaina / Paraty / Angra dos Reis |
| Brazil | Serra do Marumbi |
| Brazil | Urubici |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Altitude | 400 - 1800 m | Occasional altitudinal limits | (min) 100 m |
| 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%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Agriculture & aquaculture | Livestock farming & ranching - Agro-industry grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
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| Agriculture & aquaculture | Wood & pulp plantations - Agro-industry plantations | Timing | Scope | Severity | Impact | ||||
| Past, Likely to Return | Minority (<50%) | Rapid Declines | Past Impact | ||||||
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| Energy production & mining | Mining & quarrying | Timing | Scope | Severity | Impact | ||||
| Past, Unlikely to Return | Minority (<50%) | Slow, Significant Declines | Past Impact | ||||||
|
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| Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
|
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| Residential & commercial development | Commercial & industrial areas | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
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| Residential & commercial development | Housing & urban areas | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
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| Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Causing/Could cause fluctuations | Low Impact: 5 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Merulaxis ater. Downloaded from
http://datazone.birdlife.org/species/factsheet/slaty-bristlefront-merulaxis-ater on 28/05/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 28/05/2023.
