Slaty Antwren

The slaty antwren is 9 to 12 cm (3.5 to 4.7 in) long and weighs 8.5 to 10 g (0.30 to 0.35 oz). It is a smallish bird with a short tail. Adult males of the nominate subspecies are mostly dark gray with a hidden white patch between the shoulders. Their tail is dark gray with thin white edges to the feathers. Their wings are dark gray with white tips on the coverts. Their throat and upper breast are black; their crissum is dark gray with whitish tips on the feathers. Adult females have grayish olive upperparts with a browner tail. Voice: The slaty antwren's song is an "upslurred whistle sounding like 'wheet' " that is given as single notes a couple of seconds apart or more quickly as two to four interations. Its calls include a "downslurred nasal whine", the "same type of note turned into nasal 'chirr' by overtones", and "sharp 'chip' notes" that are sometimes repeated as a twitter.