Southern Riverbank Warbler Myiothlypis rivularis
(aka Neotropical River Warbler Phaeothlypis rivularis, Riverbank Warbler; Basileuterus rivularis)

Brazilian name: pula-pula-ribeirinho

River Warbler, Reserva Volta Velha, Itapoá, Santa Catarina, Brazil, July 2001 - click for larger image Brazil

The Southern Riverbank Warbler is found along rivers and streams in forests where it forages on or close to the ground hopping rather than walking. It is distributed in south-east Brazil and adjacent parts of Paraguay and Argentina. See the distribution map at Birdlife International.

River Warbler, Intervales, São Paulo, Brazil, April 2004 - click for larger image It is brownish-olive above with a grey crown, whitish supercilium and lower cheek either side of a dark stripe through the eye. Underparts are whitish with buffy flanks. The HBW and Birdlife International checklist has split this species from Northern Riverbank Warbler M. mesoleuca.
River Warbler, Parque do Zizo, São Paulo, Brazil, November 2006 - click for larger image Sick mentions the relatively low frequency voice of the Neotropical River Warbler compared to other wood-warblers who inhabit the forest canopy. These lower frequencies allow their voices to better penetrate the dense vegetation and compete with the noise of running water.

River Warbler, Ubatuba, São Paulo, Brazil, November 2006 - click for larger image
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