The black-billed wood hoopoe (Phoeniculus somaliensis) is very similar to the green wood hoopoe (Phoeniculus purpureus) in appearance, but lacks the greenish gloss on the head and mantle and has a black beak rather than a red one. It is found in eastern Africa and feeds on arthropods, millipedes, beetles and other invertebrates, foraging on trunks and branches by creeping along the bark, sometimes upside-down, and probing into crevices. It breeds in holes in trees. There are eight species of wood hoopoe in Africa included in two genera, Rhinopomastus and Phoeniculus, order Coraciiformes.