Characterization: Medium-size species measuring about 23cm in length. It has long, graduated tail, short, round wings and head, black back, wings, beak, legs and chest. It also has a stain on its yellow neck; its belly and iris are also yellow. When young, they have a brown iris and no stain. 

Distribution: Almost nationwide, except for Rio Grande do Sul.

Habitat: Cattail water plants, swamps, lakes, streams, and rushes.

Habits: A diurnal and swamp species, i.e., it is always associated with aquatic environments.

Diet: Omnivorous, with a predominance of arthropods and their larvae.

Breeding: This bird lays its eggs in a deep basket bandaged with cobwebs, built on high grasses or other low plants in swamps or on their banks.

In the UFRA area: This bird species is considered little frequent, as it was only seen 12 times. It was spotted in wetlands with herbaceous plants, wetlands with riparian forests, in the restored native forests, and in fields in spontaneous regeneration.