NT
Sickle-winged Nightjar Eleothreptus anomalus



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Near Threatened A2c+3c+4c;C1
2012 Near Threatened A2c+3c+4c;C1
2008 Near Threatened A2c; A3c; A4c; C1
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency Low
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,180,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 6700 poor suspected 2007
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) 20-29 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 5.4 - - -

Population justification: The population is preliminarily estimated to number at least 10,000 individuals, roughly equating to 6,700 mature individuals. This requires confirmation.

Trend justification: A moderately rapid and on-going population decline is suspected owing to habitat loss and degradation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant Yes
Brazil N Extant Yes
Paraguay N Extant Yes
Uruguay N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Argentina Bañado La Estrella Este
Argentina Barra Concepción
Argentina Concepción-Chavarría
Argentina Estancia Puerto Valle
Argentina Estancia San Juan Poriahú
Argentina Estero Tapenagá
Argentina Estero Valenzuela
Argentina Fortín Sargento Primero Leyes
Argentina Nacientes de los riachos Monte Lindo y Tatú Piré
Argentina Nandubaysal-El Potrero
Argentina Parque Nacional El Palmar
Argentina Parque Nacional Mburucuyá
Argentina Parque Nacional Pre-Delta
Argentina Parque Nacional Río Pilcomayo
Argentina Reserva de Uso Múltiple Bañados del Río Dulce y Laguna Mar Chiquita
Argentina Reserva Natural Rincón de Santa María
Argentina Riacho He He
Argentina Valle del río Paraguay-Paraná
Argentina Valle Fluvial del Río Paraguay
Argentina Yuto y Vinalito
Brazil Banhado dos Pachecos
Brazil Campos de Água Doce e Palmas
Brazil Campos Gerais do Paraná
Brazil Cânion do Guartelá
Brazil Jaguariaíva
Brazil Parque Nacional de Brasília
Brazil Serra da Canastra
Brazil Várzeas da Região Metropolitana de Curitiba
Paraguay Parque Nacional San Rafael
Paraguay Tapyta

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Subtropical/Tropical Moist Lowland suitable breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Savanna Dry suitable breeding
Savanna Dry suitable non-breeding
Savanna Moist suitable non-breeding
Savanna Moist suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable non-breeding
Altitude 0 - 1100 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Fire & fire suppression Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Natural system modifications Other ecosystem modifications Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Pollution Agricultural & forestry effluents Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2017) Species factsheet: Eleothreptus anomalus. Downloaded from http://www.birdlife.org on 18/12/2017. Recommended citation for factsheets for more than one species: BirdLife International (2017) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 18/12/2017.