Small antbird with a long, graduated tail. Males are mostly gray with a black crown, white eyebrow, and paler underparts. Note the short black eye-line. Females have buff-edged crown feathers and pale buff underparts. Occurs in dry woodland and scrub (caatinga) including enclaves of savanna in the Amazon. Sometimes accompanies mixed-species flocks. Sings a short fast rattle: “wrrrrrru.” The male of the similar Black-capped Antwren has a longer and more distinct eye-stripe, and the male of the Large-billed Antwren has a longer, thicker bill.