Common Scale-backed Antbird

Identification

The common scale-backed antbird is a small passerine, measuring 12–13 cm long and weighing 15–22 g. Sexual dimorphism is pronounced. Males of the nominate subspecies are predominantly gray with darker upperparts, featuring a distinctive white patch between the scapulars and white-edged black patches on the lower back that give the species its English name. Wings and tail are black with white edges and tips. Females display quite different plumage: a reddish yellow-brown crown and face, olive-brown upperparts with buff-edged dark patches on the lower back, and gray underparts with a reddish yellow-brown tinge on the flanks. The five recognized subspecies show considerable plumage variation, particularly among females, leading some researchers to propose that certain subspecies merit full species status.

Range & Habitat

The common scale-backed antbird is distributed across the Amazon basin, with different subspecies found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. The species primarily inhabits the understorey of humid terra firme evergreen forest, though it also occurs in várzea and igapó forest types. Elevational range varies by region, reaching 1,350 m in Brazil and Peru, 1,300 m in Venezuela, but typically below 700 m in Ecuador, where it occasionally reaches 1,100 m.

Behaviour & Diet

The common scale-backed antbird is a year-round resident throughout its range. It feeds predominantly on a wide variety of arthropods and occasionally small lizards, typically foraging within 1 m of the ground, though sometimes reaching 3 m and rarely to 5 m. It forages individually, in pairs, or in family groups, and in some regions joins mixed-species feeding flocks. The species actively follows army ant swarms, capturing prey flushed by the ants, though it also forages independently away from swarms. Hunting technique involves short sallies from a perch to the ground, foliage, branches, and vines, and occasionally gleaning from leaf litter.

Best Time & Places to See It

The breeding season varies dramatically across its range, from November to March in French Guiana to December–July in Ecuador, with year-round breeding possibly occurring in Brazil. The species is a permanent resident, making it potentially observable throughout the year. Look for it in the forest understorey of terra firme evergreen forest across its wide Amazonian range, particularly in areas where family groups or mixed-species flocks are active.

Photography Tips

The species' small size and preference for low understorey habitats present challenging shooting conditions. The pronounced sexual dimorphism offers excellent opportunities to document plumage differences between males and females. Forest understorey lighting is typically dim; use a fast lens and higher ISO to capture sharp images. Patient observation of foraging behavior—particularly the characteristic short sallies to the ground and leaf-litter probing—can yield dynamic action shots. During army ant swarms, multiple individuals may concentrate in a small area, providing better photographic opportunities.