Orange-bellied Antwren

The orange-bellied antwren is 9.5 to 10.5 cm (3.74 to 4.13 in) long and weighs 6.5 to 7 g (0.23 to 0.25 oz). Adult males' crown, nape, and upper back are streaked black and white. The rest of their upperparts are black with a few white streaks; they have a hidden white patch between the shoulders. Their wings are black with pale edges on the flight feathers and wide white tips on the coverts. Their tail is blackish. Their throat and underparts are white. Adult females have a rufous back and rump and orange underparts. The white streaks on their head have a pale buff tinge.

The orange-bellied antwren has a disjunct distribution in the northeastern Brazilian states of Pernambuco and Alagoas. It inhabits the subcanopy and canopy of semi-humid evergreen forest. In elevation it mostly ranges between 200 and 700 m (660 and 2,300 ft) but occurs as low as 100 metres (330 ft).

The orange-bellied antwren's diet is not known in detail but is mostly insects and probably includes spiders. It forages singly, in pairs, or in family groups, and often though not habitually as part of a mixed-species feeding flock. It feeds mostly between about 7 and 20 m (20 and 70 ft) above the ground though sometimes as low as 5 m (20 ft). It actively and restlessly gleans its prey in dense vegetation, mostly in vine tangles. It typically gleans while perched or with short lunges. It sometimes makes short sallies to hover-glean. It is not known to follow army ant swarms.