The Sunbittern is a bittern-like bird of tropical regions of the Americas, and the sole member of the family Eurypygidae.

The bird has a generally subdued coloration, with fine linear patterns of black, grey and brown. Its remiges however have vividly-colored middle webs, which with wings fully spread show bright eyespots in red, yellow, and black. These are shown to other sunbitterns in courtship and threat displays, or used to startle potential predators. Like some other birds, the Sunbittern has powder down.

The Sunbittern's range extends from Guatemala to Brazil. It is normally found near wooded streams or creeks at elevations of up to 909 m. It hunts fish and other small vertebrates much in the same way as herons do.