Description wikipedia

The slaty antwren (Myrmotherula schisticolor) is a small passerine bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found from Mexico south through Central America, Colombia, Ecuador, Peru, and Venezuela. 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. Their wings are browner than the back with rufous edges on the coverts. Their throat is pale cinnamon, their sides and flanks olive-brown, and the rest of their underparts tawny-tinged cinnamon that becomes yellowish brown on the crissum. Males of subspecies M. s. sanctaemartae are much paler than nominate males, with browner edging on the flight feathers. The black on their underside is only on the throat and center of the uppermost breast. Females have much grayer upperparts and more yellowish-brown underparts than nominate females. Males of subspecies M. s. interior are intermediate between those of the nominate and sanctaemartae. Their white shoulder patch is small. Females are darker and more blue-gray than sanctaemartae females, with tawny-tinged cinnamon underparts.