World Bird List

Species factsheet
Yellow-bellied Greenbul (Chlorocichla flaviventris)

Order: Chlorocichla flaviventris
Family: Bulbuls (Pycnonotidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
centralis s Somalia to n Mozambique
occidentalis nw Angola to w Tanzania south to nw Namibia, n Botswana, n South Africa and c Mozambique
flaviventris e South Africa and s Mozambique