A small flycatcher of forested habitats on Oahu. Adults are brown above, whitish below, and have white wingbars, rump, and tail tips. Immatures are reddish brown and have buffy wingbars. Uncommon and local on Oahu, more numerous in valleys. Bold and curious; not afraid of people and may follow hikers. Often holds tail cocked up at an angle. Male song is a shrill “El-eh-pie-oh” for which the species is named. Both sexes give a variety of soft calls and scolding notes. Responds to pishing and squeaking.