### Identification Often described as a "living jewel," the African Emerald Cuckoo (*Chrysococcyx cupreus*) is arguably Africa’s most beautiful bird. The male is unmistakable: his entire upperparts, throat, and breast are a blinding, iridescent emerald green, contrasted sharply against a vibrant canary-yellow belly. Look for the white barring on the outer tail feathers as a key field mark. The female is more cryptic, sporting copper-green and rufous barring across her back and a white underside with dark green bands. While similar to the Klaas’s or Diederik Cuckoo, the Emerald is distinguished by the male’s solid green throat and the sheer intensity of its yellow underparts.
### Habitat & Range This species is a denizen of the deep canopy. Its range spans Sub-Saharan Africa, from the lush lowland rainforests of West and Central Africa to the coastal and montane evergreen forests of the east and south. They require mature, dense vegetation and are rarely seen in open savannah, preferring the humid microclimates of gallery forests and thickets.
### Behaviour Secretive and arboreal, the Emerald Cuckoo is more often heard than seen. Its iconic, rhythmic four-note whistle—vividly translated by birders as *"Hello Geor-gie"*—is the soundtrack of the African forest. They are solitary birds. As brood parasites, they do not raise their own young; instead, they stealthily monitor the nests of hosts like bulbuls, puffbacks, and sunbirds. An observer might catch a glimpse of a male displaying on a high, bare branch, puffing out his chest to catch the sunlight while calling incessantly.
### Diet These cuckoos are specialist insectivores. They have a particular fondness for "hairy" caterpillars, which many other birds find unpalatable. They forage by gleaning insects from foliage high in the treetops, occasionally hovering to snatch a caterpillar from the underside of a leaf.
### Fascinating Fact The speed of their parasitism is breathtaking. To avoid detection by the host parents, a female Emerald Cuckoo can fly into a nest, swallow one of the host's eggs, and lay her own replacement in as little as five seconds—a masterclass in high-speed avian deception!