Buntings and New World Sparrows (Emberizidae)

Marsh Seedeater (Sporophila palustris) - HBW 16, p. 659

French: Sporophile des marais German: Sumpfpfäffchen Spanish: Semillero Palustre
Other common names: White-bibbed Seedeater; Narosky’s/Entre Rios Seedeater (“S. zelichi”)

Taxonomy: Spermophila palustris Barrows, 1883, near Concepción del Uruguay, Entre Ríos, Argentina.
Molecular evidence suggests that genus is closely related to Oryzoborus, which should perhaps be subsumed within it; further, that both genera should be placed in the tanager family (Thraupidae). A molecular-genetic study of 17 species in genus, including ten in “capped” group (“capuchinos”), indicated that latter form two clades, a N clade largely N of R Amazon containing S. minuta and S. castaneiventris, and a S clade consisting of present species and S. bouvreuil, S. hypoxantha, S. hypochroma, S. ruficollis, S. cinnamomea and <.. View all taxonomy...

Taxonomy: Spermophila palustris Barrows, 1883, near Concepción del Uruguay, Entre Ríos, Argentina.
Molecular evidence suggests that genus is closely related to Oryzoborus, which should perhaps be subsumed within it; further, that both genera should be placed in the tanager family (Thraupidae). A molecular-genetic study of 17 species in genus, including ten in “capped” group (“capuchinos”), indicated that latter form two clades, a N clade largely N of R Amazon containing S. minuta and S. castaneiventris, and a S clade consisting of present species and S. bouvreuil, S. hypoxantha, S. hypochroma, S. ruficollis, S. cinnamomea and S. melanogaster. Determination of relationships within the S clade not possible, as genetic differentiation very low and species are apparently part of a very recent and rapid radiation. Has been suggested that present species is a white-throated morph of S. ruficollis or a colour morph of S. hypoxantha. In addition, form described as S. zelichi (from Entre Ríos, in NE Argentina) considered to be a white-necked morph of present species, to which it is vocally identical, and found in same habitat and at same locations as it; or possibly a hybrid between present species and S. cinnamomea. Monotypic.

Distribution: Breeds in NE Argentina (Corrientes and Entre Ríos, possibly also Buenos Aires), extreme SE Brazil (Rio Grande do Sul) and Uruguay (R Uruguay basin and SE wetlands), possibly also SE Paraguay. Migrates N as far as SC Brazil (N to S Mato Grosso, S Goiás and W Minas Gerais) and E Paraguay.