Males are conspicuously yellow and black, while females have dark brown where males are black. Some breeding records report extra males feeding nestlings.
Males have a black back, wings, and tail, with a yellow head and underparts and a black crown patch. In females, the male’s black areas are dark brown.
Some breeding colonies have extra males that help feed nestlings, a pattern described as apparently cooperative breeding.
An extinction-risk assessment has not been added yet.