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 |
|---|---|---|
| - | - | B2ab(i,ii,iii,iv,v); C2a(i) |
| Year | Category | Criteria |
|---|---|---|
| 2017 | Vulnerable | B2ab(i,ii,iii,iv,v); C2a(i) |
| 2016 | Vulnerable | A2c+3c+4c;B1ab(i,ii,iii,iv,v);C2a(i) |
| 2012 | Vulnerable | A2c+3c+4c;B1ab(i,ii,iii,iv,v);C2a(i) |
| 2008 | Vulnerable | A2c; A3c; A4c; B1a+b(i,ii,iii,iv,v); C2a(i) |
| 2004 | Vulnerable | |
| 2000 | Vulnerable | |
| 1996 | Vulnerable | |
| 1994 | Vulnerable | |
| 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) | 879,000 | medium |
| Extent of Occurrence breeding/resident (km2) | 1,900 | |
| Number of locations | 11-100 | - |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 2500-9999 | 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 | - | - | - |
| Percentage in largest subpopulation | 1-89 | - | - | - |
| Generation length (yrs) | 4.8 | - | - | - |
Population justification: The population is estimated to number 2,500-9,999 mature 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 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals. Densities of 60-113 birds/km2 have been found (Silva 2007).
Trend justification: Forest loss within the species's range has been estimated at c.3.4% over 3 generations (c.14 years) (Tracewski et al. 2016). Therefore, the rate of decline in this species is suspected to be <10% over 3 generations.
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Brazil | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Brazil | Ibiquera / Ruy Barbosa |
| Brazil | Mata do Crasto e Restingas de Itaporanga e Estância |
| Brazil | Mata Estrela |
| Brazil | Raso da Catarina |
| Brazil | Serra de Itabaiana e Matas de Areia Branca |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Dry | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Savanna | Dry | major | resident |
| Shrubland | Subtropical/Tropical Dry | suitable | resident |
| Altitude | 0 - 850 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 | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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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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| 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%) | Rapid Declines | Medium Impact: 7 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Herpsilochmus pectoralis. Downloaded from
http://datazone.birdlife.org/species/factsheet/pectoral-antwren-herpsilochmus-pectoralis on 04/06/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 04/06/2023.
