Klaas's Cuckoo lives in forests and woodlands of Africa and the southern Arabian Peninsula. It searches among leaves for caterpillars and lays its eggs in other birds' nests.
Adult males are metallic green above, with a white patch behind the eye and a green half-collar extending onto the sides of the breast. Females have different grey-brown and barred plumage.
It gleans caterpillars and other insects from leaves and lays eggs in other birds’ nests to be raised by the hosts.
An extinction-risk assessment has not been added yet.