Ash-breasted antbird

The ash-breasted antbird (Myrmoborus lugubris) is an insectivorous bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil, Colombia, Ecuador, and Peru.

The ash-breasted antbird is 12 to 13.5 cm (4.7 to 5.3 in) long and weighs 20 to 23 g (0.71 to 0.81 oz). Adult males of the nominate subspecies M. l. lugubris have mostly gray upperparts with a whitish forehead. Their face and throat are black. Their underparts are grayish white. Adult females have mostly rufescent-tinged brown upperparts, wings, and tail with small buff tips on their wing coverts. Their throat is white and the rest of their underparts are mostly whitish with olivaceous flanks. Both sexes have a red iris and gray legs and feet. Males have a black bill; females have a black maxilla and a gray mandible.

The males of the others subspecies are like the nominate male. Females of subspecies M. l. femininus have black lores and ear coverts and more rufescent upperparts than the nominate. Females of M. l. stictopterus have upperparts intermediate between the nominate and femininus and paler underparts than both. Females of M. l. berlepschi have more olive upperparts than the other subspecies, their white throat has a thin band of black speckles below it, and their belly is somewhat grayer than the others'.