Taxonomic note
Formicivora acutirostris (del Hoyo and Collar 2016) was previously listed as Stymphalornis acutirostris.
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: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2019 | Near Threatened | B2ab(ii,iii,iv,v) |
2016 | 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 | does not normally occur in forest |
Land-mass type |
continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 27,900 km2 | medium |
Area of Occupancy (breeding/resident) | 100 km2 | |
Number of locations | 11-100 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 5000-9999 mature individuals | good | estimated | 2013 |
Population trend | decreasing | poor | inferred | 2006-2020 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 1-9% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 1-9% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 1-9% | - | - | - |
Generation length | 4.8 years | - | - | - |
Number of subpopulations | 9 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The species is locally fairly common. Its population size was previously estimated at 17,700 mature individuals (Reinert et al. 2007), but a more recent study estimated the population at 7,511 mature individuals, based on recorded population densities and estimated areas of a range of habitats (Bornschein 2013). The population size is therefore placed in the band 5,000 - 9,999 mature individuals.
Trend justification: A continuing decline in population size can be inferred from the estimated reduction in the area of occupied habitat (Bornschein 2013). A study of the area of habitat within the species’s range estimated that it had decreased by 9.5% between 1978-1980 and 2013, largely as a result of encroachment of invasive plant species (Bornschein 2013), which is equivalent to a reduction of approximately 4% across three generations (14.4 years).
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Brazil | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Brazil | Área de Proteção Ambiental de Guaratuba |
Brazil | Baía da Babitonga |
Brazil | Rio Guaraguaçu |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Grassland | Subtropical/Tropical Seasonally Wet/Flooded | suitable | resident |
Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | major | resident |
Wetlands (inland) | Shrub Dominated Wetlands | suitable | resident |
Altitude | 0 - 5 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Biological resource use | Gathering terrestrial plants - Unintentional effects (species is not the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Low Impact: 4 | |||||||
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Climate change & severe weather | Other impacts | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Energy production & mining | Mining & quarrying | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Human intrusions & disturbance | Recreational activities | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Human intrusions & disturbance | Work & other activities | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Hedychium coronarium | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Named species | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant 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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Pollution | Industrial & military effluents - Oil spills | Timing | Scope | Severity | Impact | ||||
Past, Likely to Return | Minority (<50%) | Slow, Significant Declines | Past Impact | ||||||
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Residential & commercial development | Commercial & industrial areas | 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 | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2024) Species factsheet: Parana Antwren Formicivora acutirostris. Downloaded from
https://datazone.birdlife.org/species/factsheet/parana-antwren-formicivora-acutirostris on 23/11/2024.
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 23/11/2024.