Any of several tyrant flycatchers, especially of the genera Fluvicola and Ochthornis, which live on marshes and riversides in Central and South America.
Origin
Early 20th century.
Definition of water-tyrant in US English:
water-tyrant
noun
Any of several tyrant flycatchers, especially of the genera Fluvicola and Ochthornis, which live on marshes and riversides in Central and South America.