Chestnut-backed Antshrike

Identification

The chestnut-backed antshrike is a medium-sized antbird measuring 16 to 17 cm in length. Like all members of its genus, it possesses a stout, hooked bill characteristic of shrikes. Sexual dimorphism is evident: males display a black crown with white spots on the forehead, black face and nape with white spotting, rufous-brown upperparts and wings, and black-and-white striped throat with barred underparts tinged rufous on the flanks. Females are similar but feature a deep rufous-brown crown and broader white barring below. Both sexes sport a pale, variably colored iris and a distinctive crest. Subspecific variation occurs across its range, with some populations appearing paler overall or displaying different intensities of ochre wash and barring patterns.

Range & Habitat

The chestnut-backed antshrike has a disjunct distribution across Bolivia, Brazil, and Peru, with four recognized subspecies occupying different regions. In coastal southeastern Brazil, T. p. vestitus ranges from southern Bahia to Rio de Janeiro state. The widespread T. p. puncticeps inhabits southeastern Peru, northern Bolivia, and Brazilian Amazonia east to the Tapajós River. The nominate T. p. palliatus occurs in southern Amazonian Brazil, while T. p. similis is restricted to central Peru. This species favors semi-open landscapes including forest edges, mature secondary forest, regrowing clearings, and abandoned plantations with bamboo. It also inhabits várzea wetlands and pure stands of Guadua bamboo in lowland Amazonia. Elevations range from sea level to 2,200 m across its range.

Behaviour & Diet

The chestnut-backed antshrike is a year-round resident throughout its range. Its diet comprises insects and spiders, which it gleans through deliberate hops and quick stabs from leaves, stems, branches, and trunks in dense vegetation, typically foraging from near ground level to about 15 meters high. It usually forages singly or in pairs, frequently joining mixed-species feeding flocks. In eastern Brazil, individuals have been observed following army ant swarms, though only in dense cover. The species' song is a moderately long, accelerating series of nasal notes with rising and falling pitch, described as "kah kah-kah-kah-ka'ka'ka'kaka'pah." Its calls include emphatic short nasal notes and upward-inflected squeals.

Best Time & Places to See It

The chestnut-backed antshrike is fairly common throughout much of its range and occurs in several protected areas, making it accessible to patient observers. Breeding occurs from October to January in southeastern Brazil, likely extending to June in Amazonian regions, offering opportunities to observe territorial and nesting behavior during these periods. Early morning hours typically provide the best viewing, as the species is most vocal at dawn. Look for it in edge habitats, secondary forest, and bamboo-dominated areas where it frequents dense vegetation. Mixed-species feeding flocks passing through its territory provide particularly good viewing opportunities.

Photography Tips

Photographing the chestnut-backed antshrike requires patience and attention to its preferred microhabitat of dense vegetation. Position yourself near forest edges and secondary growth where the species is most active. Early morning light works best for capturing the rufous tones of its back and wings against the darker crown and facial markings. Use a shutter speed of at least 1/500th of a second to freeze its quick, deliberate foraging movements among branches. The bird's tendency to forage from ground level to mid-canopy offers varied composition opportunities. Dense vegetation may obscure views, but waiting at gaps in the canopy or following the sound of its distinctive accelerating song will increase your chances of obtaining clear shots. The male's contrasting plumage and pale iris provide excellent focal points for sharp detail work.