White-throated Robin-Chat

The white-throated robin-chat (Dessonornis humeralis) is a striking but often secretive member of the Old World flycatcher family. Adults are about 16–18 cm long and weigh roughly 19–29 g. The head and upperparts are slate-grey to blackish, with a bold white eyebrow and white wing bar. The throat and central underparts are white, while the rump, flanks and outer tail feathers are rich orange-rufous.

The contrasting plumage is unmistakable when the bird is seen well, but its habit of remaining low in dense cover means that the voice often gives away its presence before the bird itself appears.

The species was long placed in the genus Cossypha and is therefore still encountered as Cossypha humeralis in many older field guides and references. Phylogenetic work has since shown that it belongs with several closely related African robin-chats in the genus Dessonornis.

The name Dessonornis humeralis therefore reflects a revised understanding of relationships within the robin-chat group while referring to the same species long known as Cossypha humeralis.

White-throated robin-chats favour dense cover in woodland, thickets, riverine bush, forest edges and wooded savanna. They also use gardens and other modified habitats where a thick shrub layer, leaf litter and shaded ground remain.

In southern Africa they are particularly associated with bushveld and dense thickets along dry watercourses and river valleys and occur in major wooded landscapes such as iSimangaliso, Kruger and the Waterberg.

The diet is dominated by insects and other small invertebrates. The birds eat beetles, termites, ants, crickets, caterpillars, bugs, spiders and millipedes, and occasionally take small vertebrates and fruit.

White-throated robin-chats search through leaf litter and low vegetation, turning or flicking aside leaves to expose hidden prey, and may also take small animals from exposed soil or low branches. Most feeding takes place close to the ground and near dense cover, which helps explain the species’ close association with understorey and leaf litter.

White-throated robin-chats are usually encountered alone or in pairs and spend much of their time inside dense vegetation. Pairs defend territories and remain closely associated with cover.

The song is far more conspicuous than the bird. White-throated robin-chats have a varied, musical repertoire and are accomplished mimics, weaving phrases that resemble the calls or songs of other bird species into their own song. This can make an unseen individual surprisingly difficult to identify by ear.

The contrast is striking: a bird that spends much of its time hidden in thickets can be one of the most noticeable voices in the surrounding woodland.

In southern Africa egg laying begins in early September and extends into January, with a clear peak in October and November. The nest is a cup concealed close to or on the ground in dense vegetation, among roots or in another sheltered site.

A clutch normally contains 2–3 eggs. The female incubates for about 14–15 days, and the chicks leave the nest after roughly two weeks. Both parents feed the young, which can remain dependent on the adults for another six to seven weeks.

The species is also a recognised host of the red-chested cuckoo (Cuculus solitarius), which lays its egg in the robin-chat’s nest and leaves the host adults to raise the cuckoo chick. White-throated robin-chats are among the better-known southern African hosts of this brood parasite.

The white-throated robin-chat is classified as least concern on the IUCN Red List. It occurs across a relatively compact part of southern Africa, including Zimbabwe, southern Mozambique, Eswatini, eastern Botswana and northeastern South Africa.

The species remains common in many areas with suitable dense woodland and thicket and tolerates some human-modified habitats where sufficient cover is retained.