World Bird List

Species factsheet
Black Bishop (Euplectes gierowii)

Order: Euplectes gierowii
Family: Weavers, Widowbirds (Ploceidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
ansorgei Cameroon to s Sudan, sw Ethiopia, Uganda and w Kenya
friederichseni s Kenya and n Tanzania
gierowii sw DR Congo and nw Angola