The Couch's Kingbird, Tyrannus couchii, is a passerine tyrant flycatcher of the kingbird genus. It is found from southern Texas along the Gulf Coast to the Yucatan Peninsula in Mexico, Belize and northern Guatemala. It is also found in the lower stretches of the Rio Grande river valley, locally named Rio Grande Valley.
The name of this bird commemorates the soldier and naturalist Darius N. Couch.
It is about 7 inches. It has a large head and bill. It has a dark, forked tail. The head is pale grey with contrasting darker cheeks. The upperparts are greyish-olive. It has a pale throat and a darker breast. The lower breast is bright yellow. Juveniles have browner underparts than the adult and pale edges to their wings.