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: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
SACC. 2006. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | B1ab(i,ii,iii,iv,v); C2a(i) | A2c+3c+4c; B1ab(i,ii,iii,iv,v); C2a(i); D1 |
Year | Category | Criteria |
---|---|---|
2016 | Endangered | B1ab(i,ii,iii,iv,v);C2a(i) |
2012 | Endangered | B1ab(i,ii,iii,iv,v);C2a(i) |
2008 | Endangered | B1a+b(i,ii,iii,iv,v); C2a(i) |
2004 | Endangered | |
2000 | Endangered | |
1996 | Endangered | |
1994 | Endangered | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | medium |
Land-mass type |
continent |
Average mass | 26 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 12,000 km2 | medium |
Number of locations | 6-10 | - |
Severely fragmented? | yes | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 600-1700 mature individuals | poor | estimated | 2000 |
Population trend | decreasing | poor | suspected | 1998-2008 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Generation length | 4.8 years | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The population is estimated to number 1,000-2,499 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 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals. However, censuses in forest fragments in Boa Nova revealed an average density of 0.9 individuals / hectare and suggests that the populations exceeds 2500 birds (E. Luiz in litt. 2012, Luiz et al. 2015, Zimmer et al. 2015).
Trend justification: A rapid and ongoing population decline is suspected owing to rates of habitat loss.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Brazil | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Brazil | Boa Nova / Serra da Ouricana |
Brazil | Fazenda Santana |
Brazil | Jequié |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Dry | major | resident |
Shrubland | Subtropical/Tropical Dry | suitable | resident |
Altitude | 100 - 900 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 | Whole (>90%) | Rapid Declines | High Impact: 8 | ||||||
|
|||||||||
Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Whole (>90%) | Slow, Significant Declines | Medium Impact: 7 | ||||||
|
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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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Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Slender Antbird Rhopornis ardesiacus. Downloaded from
https://datazone.birdlife.org/species/factsheet/slender-antbird-rhopornis-ardesiacus on 24/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 24/12/2024.