World Bird List

Species factsheet
Little Greenbul (Eurillas virens)

Order: Eurillas virens
Family: Bulbuls (Pycnonotidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
amadoni Bioko I.
erythroptera Gambia to s Nigeria
virens w Cameroon to s Sudan, w Kenya, s DR Congo and n Angola
zanzibarica Zanzibar
zombensis se DR Congo and n Zambia to se Kenya and n Mozambique