The sergeant is a passerine bird in the Icteridae family. Also known as doremi-of-wings-yellow and bird-black-winged yellow.
Previous name - Agelaius thilius.
It measures about 17 cm. in length. Overall, with black upper and lower parts of the yellow wings. The female and the young are brownish striated. When lands appears uniform black plumage.
Seeds and insects
It usually has one brood per season with 3 eggs. Usually nest in the grass.
It lives in swamps, tabuais, fields without trees. Do you usually floating plants.