Yellow-winged Blackbird - Agelasticus thilius

Yellow-winged Blackbird (Agelasticus thilius)
(aka Agelaius thilius, Chrysomus thilius)
Brazilian name: Sargento
Chilean name: Trile

Male and female Yellow-winged Blackbird with female Chestnut-capped Blackbird, Taim, Rio Grande do Sul, Brazil, August 2004 - click for larger image

The Yellow-winged Blackbird is distributed in south Brazil, Uruguay, central Argentina and central Chile and into the Altiplano of Bolivia and Peru. See the distribution map at xeno-canto. It is found in marshes and is always close to water.

The male is black with yellow shoulders and underwing coverts but these are not always shown as can be seen in the first photo. This also shows a female at the bottom of the frame with a pale supercilium and heavy streaking below. The other bird in this photo is a female Chestnut-capped Blackbird Chrysomus ruficapillus.

Male Yellow-winged Blackbird, Taim, Rio Grande do Sul, Brazil, August 2004 - click for larger image

The second photo is of the same male bird in what I presume is the display that Alvaro Jaramillo calls the "ruff-out (song spread)" display with "the body plumage ruffled, the wings partially spread showing the yellow epaulets, and the tail slightly spread and held pointing downwards."

Male Yellow-winged Blackbird, Concon, Chile, November 2005 - click for larger image

Male Yellow-winged Blackbird, Lagoa do Peixe, Rio Grande do Sul, Brazil, October 2022 - click for larger image

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