White-browed Coucal

The white-browed coucal or lark-heeled cuckoo, is a species of cuckoo in the family Cuculidae. It is found in sub-Saharan Africa. It inhabits areas with thick cover afforded by rank undergrowth and scrub, including in suitable coastal regions. Burchell's coucal is sometimes considered a subspecies.

White-browed Coucals are primarily terrestrial and exhibit skulking behavior, preferring to move quietly through dense thickets and tall grasses. They are diurnal, with peak activity in the early morning and late afternoon. Their diet is omnivorous, consisting mainly of large insects (grasshoppers, beetles, caterpillars), spiders, snails, small reptiles, amphibians, and occasionally small birds and mammals. They also consume fruits and berries, especially during the dry season when animal prey is scarce. Coucals hunt by stalking and pouncing on prey, using their strong bill to subdue and kill. Socially, they are monogamous and territorial, with pairs maintaining and defending territories through vocalizations and displays. They are not brood parasites like many other cuckoos; instead, they build their own nests and rear their young. Roosting occurs in dense cover, and they rarely fly long distances, preferring to run or hop through vegetation.

Breeding occurs during the rainy season, which varies regionally but often coincides with increased food availability. Pairs construct a large, domed nest of grasses and leaves, usually low in a bush or thicket (0.5–3 m above ground). The female typically lays 2–4 white eggs, which are incubated by both parents for about 14–15 days. Both sexes participate in feeding and brooding the chicks, which are altricial at hatching and fledge after approximately 17–21 days. Parental care continues for several weeks post-fledging. Unlike many cuckoos, White-browed Coucals do not practice brood parasitism; instead, they exhibit strong parental investment and cooperative care.

The species' cryptic coloration and preference for dense, tangled vegetation provide effective camouflage from predators. Their long, graduated tail aids in balance and agility when moving through undergrowth. The robust, decurved bill is well-suited for capturing a wide range of prey, including hard-shelled insects and small vertebrates. Behavioral adaptations include secretive movement and the use of alarm calls to warn mates or offspring of danger. Their omnivorous diet allows them to exploit a variety of food sources, enhancing survival in fluctuating environments. The ability to breed opportunistically in response to rainfall is an adaptation to the unpredictable climate of sub-Saharan Africa.

In several African cultures, coucals are associated with folklore and are sometimes regarded as omens or weather predictors, due to their distinctive calls before rain. In some regions, their calls are believed to herald changes in weather or the onset of the rainy season. There are few records of direct use in traditional medicine or as food, likely due to their secretive habits and unremarkable plumage compared to more conspicuous birds.

Recent studies have focused on the phylogenetic relationships within the Centropus genus, with some debate regarding the taxonomic status of Burchell's Coucal (Centropus burchellii), which is sometimes treated as a subspecies of C. superciliosus. Bioacoustic research has analyzed the structure and function of their vocalizations, revealing complex duetting behavior in pairs. Ecological studies have examined their role in controlling insect populations and their adaptability to human-altered landscapes. Ongoing research includes the effects of habitat fragmentation and climate change on breeding success and distribution.

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The White-browed Coucal is currently classified as Least Concern on the IUCN Red List.

Currently assessed as Least Concern by the IUCN, the White-browed Coucal has a wide distribution and a stable population. However, localized threats include habitat loss due to agricultural expansion, overgrazing, and urbanization, which can reduce the availability of suitable dense cover. Pesticide use may indirectly affect populations by reducing insect prey abundance. The species is generally tolerant of moderate habitat disturbance and can persist in secondary growth and degraded areas, but severe habitat fragmentation could pose future risks. There is no evidence of significant hunting or trapping pressure.