|A male Temminck's seedeater at Horto Florestal, São Paulo, Brazil|
|A female Temminck's seedeater at Intervales State Park, São Paulo State, Brazil|
It is found in eastern South America, mainly in far northeastern Argentina and along the southeastern Brazilian coastline. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. It is threatened by habitat loss.
- BirdLife International (2012). "Sporophila falcirostris". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. pp. 335–336.
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