NT
Bay-capped Wren-spinetail Spartonoica maluroides



Taxonomy

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: #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 C1+2a(i)
2012 Near Threatened C1+2a(i)
2008 Near Threatened C1; C2a(i)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type Land-mass type - continent
Average mass 11 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,380,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate 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) 1-9 - - -
Decline (10 years/3 generation past and future) 1-9 - - -
Number of subpopulations - - -
Largest subpopulations 100 - - -
Generation length (yrs) 3.8 - - -

Population justification: The global population size has not been quantified, but this species is described as 'fairly common' (Stotz et al. (1996).

Trend justification: A slow decline is suspected to be occurring, owing to on-going drainage and conversion of wetland habitats.


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 Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Uruguay Castillos Lagoon
Argentina Bañado de Añatuya
Argentina Bañados de Figueroa
Argentina Valle Fluvial del Río Paraguay
Argentina Estancia La Leonor
Argentina Estero Tapenagá
Argentina Parque Nacional Chaco
Argentina Valle del río Paraguay-Paraná
Argentina Reserva El Bagual
Argentina Estancia La Alegría
Argentina Bañado La Estrella Este
Argentina Parque Nacional Río Pilcomayo
Argentina Rincón del Socorro-Iberá
Argentina Concepción-Chavarría
Argentina Nandubaysal-El Potrero
Argentina Islas de Victoria
Argentina Cuña boscosa de Santa Fe
Argentina Bajos Submeridionales
Argentina Dorso Occidental Subhúmedo de Santa Fe
Argentina Reserva Provincial de Usos Múltiples Federico Wildermuth
Argentina Laguna Melincué
Argentina Sur de Ramallo
Argentina Vuelta de Obligado
Argentina Barrancas de Baradero
Argentina Reserva Natural Otamendi, Reserva Provincial Río Lujan y alrededores
Argentina El Talar de Belén
Argentina Reserva Natural de Uso Múltiple Isla Martín García
Argentina Reserva Natural Punta Lara
Argentina Parque Costero del Sur
Argentina Bahía de Samborombón y Punta Rasa
Argentina Laguna de Pradere
Argentina Reserva de Biosfera Albufera de Mar Chiquita
Argentina Reserva Provincial Laguna Salada Grande
Argentina Estancia San Ignacio
Argentina Estancia Medaland
Argentina Reserva Campos del Tuyú, Estancia El Palenque y Los Ingleses
Argentina Cuenca del Río Salado
Argentina Reserva Ecológica Costanera Sur
Argentina Bañados del Río Saladillo
Argentina Bañados del Arroyo Chucul y Reserva Natural de Fauna Laguna La Felipa
Argentina Lagunas del suroeste y relictos del Caldenal
Argentina Reserva de Uso Múltiple Bañados del Río Dulce y Laguna Mar Chiquita
Argentina San Antonio Oeste
Uruguay José Ignacio Lagoon
Uruguay Arroyo Maldonado wetlands
Uruguay Rocha Lagoon
Uruguay Santa Lucía Wetlands
Uruguay Penino Beach and Santa Lucía Wetlands
Argentina Bañados del Utis
Brazil Banhado do Taim
Brazil Banhado do Maçarico e Cordões Litorâneos Adjacentes
Brazil Várzea do Canal São Gonçalo
Brazil Estuário da Laguna dos Patos
Brazil Parque Nacional da Lagoa do Peixe
Argentina Lagunas Encadenadas del Oeste de la Provincia de Buenos Aires

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) major non-breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) major breeding
Wetlands (inland) Permanent Saline, Brackish or Alkaline Marshes/Pools major breeding
Wetlands (inland) Permanent Saline, Brackish or Alkaline Marshes/Pools major non-breeding
Altitude 0 - 900 m Occasional altitudinal limits  

Threats & impact
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
Stresses
Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations - Agro-industry plantations Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion
Natural system modifications Dams & water management/use - Abstraction of surface water (agricultural use) Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2020) Species factsheet: Spartonoica maluroides. Downloaded from http://www.birdlife.org on 30/05/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/05/2020.