The Sunbittern (Eurypiga helias) is a bittern-like bird of tropical America. It is however more closely related to the railss, but placed in a family of its own, Eurypigidae .

It frequents forest streams, hunting fish in the same way as a heron. The wings are patterned with black, grey and brown, and are displayed in courtship.

The domed nest is built in a tree. Two grey eggs are laid.

The relationships of this species are shown below