The black-sided robin, or pied robin, is a diminutive bird, with a length ranging from 13 to 15 centimeters. It is adorned with a striking contrast of black and white plumage. The upperparts, including the crown, nape, back, wings, and tail, are cloaked in black or brownish-black, complemented by an eye-stripe of the same dark hue. A pair of white eyebrows, a white throat, and underparts, along with a distinctive white patch on the wings, provide a stark contrast. The bill is a deep black, the eyes a dark brown, and the legs present in shades of grey or pink.
When attempting to identify the black-sided robin, look for the characteristic black and white plumage, the white patch on the wings, and the black eye-stripe. The white eyebrows are also a key feature to distinguish it from other species.
The black-sided robin is a denizen of subtropical or tropical moist lowland forests, where it prefers the understory or forest floor.
This species is widespread throughout New Guinea, from the Huon Peninsula west to the western limits of West Papua and the West Papuan Islands, though it is notably absent from the transfly region in the south.
The black-sided robin is a shy and elusive bird, more often heard than seen. It is typically encountered alone or in pairs, foraging in the understory or on the forest floor.
An insectivorous bird, the black-sided robin employs a method of hunting that involves gleaning and snatching insects from tree trunks, branches, and the ground.
The IUCN Red List has classified the black-sided robin as Least Concern, indicating that, at present, there are no immediate threats to its population numbers that would warrant a higher level of concern.