Bay-capped Wren-Spinetail
Spartonoica maluroides
The bay-capped wren-spinetail is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Brazil, Paraguay, and Uruguay.
4
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Bay-capped_wren-spinetail
Taxonomy & Classification
Kingdom
Animalia
Phylum
Chordata
Class
Aves
Order
Passeriformes
Family
Furnariidae
Genus
Spartonoica
Bay-capped Wren-Spinetail belongs to the family Furnariidae, order Passeriformes, within the Aves class.
Species Profile
The bay-capped wren-spinetail is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Brazil, Paraguay, and Uruguay.
The Bay-capped Wren-Spinetail faces significant threats from habitat loss and degradation due to agricultural expansion, cattle ranching, and urban development across its range in South America's grasslands and wetlands. Climate change poses additional risks by altering precipitation patterns and water levels in the marshy habitats this species depends on. Conservation status may vary by region or assessment authority, but populations are declining due to the conversion of native grasslands to cropland and pasture.
Key Facts
Habitat & Distribution
Inhabits tall grasslands, reed beds, and marshy areas with dense vegetation, particularly favoring cattail marshes and wet grasslands near water bodies. The species is typically found in lowland areas with abundant grasses and sedges that provide both nesting sites and foraging opportunities.
Threats
Agricultural expansion and conversion of grasslands
Cattle ranching and overgrazing
Climate change affecting precipitation patterns
Urban development and infrastructure expansion
Wetland drainage and water management changes
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Bay-capped Wren-Spinetail (Spartonoica maluroides). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/bay-capped-wren-spinetail