Caatinga Antwren

The Caatinga antwren is 10.5 to 11.5 cm (4.1 to 4.5 in) long and weighs 6.5 to 8 g (0.23 to 0.28 oz). Adult males have a black crown and nape. They have white lores, a long white to pale gray supercilium, and a short blackish streak behind the eye on an otherwise gray face. Their upperparts are mostly gray with a white patch between the scapulars. Their outer scapulars are blackish with white edges. Their wings are mostly black with white edges on the flight feathers and white tips on the coverts. Voice: The Caatinga antwren's song is a "very high, short, fast rattle, like 'wrrrrrru'; somewhat rising at start and lowered at end". It makes a call, "a short...repetition of wiip notes" and also a one-second rattle that is preceded by a "slightly longer downslurred note" and rises in pitch.