World Bird List

Species factsheet
Green-backed Woodpecker (Campethera cailliautii)

Order: Campethera cailliautii
Family: Woodpeckers (Picidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
permista Ghana to sw Sudan south to n Angola and c DR Congo
nyansae sw Kenya, sw Ethiopia and nw Tanzania to ne Angola and n Zambia
cailliautii s Somalia to ne Tanzania
loveridgei c Tanzania to Mozambique