This is a female. Males have a white throat. This bird was rather elusive, at least when I was around. It resembles the Southern Fiscal but behaves quite differently. The boubou (pronounced boo-boo) is a skulker in low vegetation while the fiscal tends to perch up in the open. This photo shows the pink blush on the underparts which helps confirm the identification. Fiscals are in the Shrike family (Laniidae) while boubous are in the Bushshrike family (Malaconotidae). Canon PowerShot SX50 HS.
References:
Fry, H. (2018). Southern Boubou (Laniarius ferrugineus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/60528 on 26 June 2018).
Hockey, PAR, WRJ Dean, and PG Ryan, eds. 2005. Roberts' Birds of Southern Africa. 7th ed. Cape Town: John Voelcker Bird Book Fund.
Sinclair, I., Hockey, P.A.R., Arlott, N. (2005). The Larger Illustrated Guide to Birds of Southern Africa. Struik, Cape Town.