The coucal is a cuckoo that rejects the family tradition of brood parasitism

Nature · Published 3 October 2026 Swipe more like this →

In short: While most cuckoos are infamous for tricking other birds into raising their offspring, the coucal takes a different path. These ground-dwelling birds build their own nests and share parental duties in a unique way, often reversing traditional gender roles to ensure their young survive in the dense vegetation they call home.

The coucal belongs to the family Cuculidae, a diverse group of birds found across temperate and tropical regions. While the family is best known for brood parasitism—where adults lay eggs in the nests of other species—coucals are a notable exception. Unlike their parasitic relatives, which rely on egg mimicry and nest-mate ejection to ensure their young are reared by foster parents, coucals are responsible parents that construct their own nests.

These birds, comprising about 27 species within the genus Centropus, are distributed from Africa and Madagascar to southern Asia, Australia, and the Solomon Islands. They are medium to large birds, ranging from 30 to 90 cm in length. Physically, they are characterized by loose plumage, stout downcurved bills, and zygodactyl feet, where the outer toe points backward. Their terrestrial nature is reflected in their anatomy, as they often inhabit thick vegetation where they are more frequently heard than seen.

Beyond their refusal to parasitize other nests, coucals exhibit fascinating reproductive behaviors. In many species, the male takes on the primary burden of parental care, including nest building, incubation, and feeding the young. This sex-role reversal is a distinct departure from the typical behaviors seen in the wider cuckoo family. Some species even display unique adaptations, such as the ability to carry their young while in flight, further highlighting their commitment to their own offspring.

The name of the genus, Centropus, reflects a key physical feature: the long claw on the hind toe, or hallux. This claw is a defining characteristic for many species, though its relative length varies. Whether foraging for insects or small mammals, these birds remain elusive, shy inhabitants of their environments. By choosing to raise their own young rather than outsourcing the task, coucals maintain a unique ecological niche within the broader, often misunderstood, cuckoo family.

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