It measures 17 cm. Black with some glitter, has the crown and a "bib" dark brick color, its peak is clear. Female: dull coloration, the dorsal side is darker, while the ventral is clear, with some stripes, throat clear. It is gregarious, usually always very noisy, with whistles and shouts passages.
He moves constantly from one place to another, stands among the reeds or on floating vegetation.