A1_17899c_2500 
The adult male hamadryas baboon has a distinctive hairdo - he's the original big-haired boss
Among the hamadryas baboons there is no mistaking an adult male for a female. His mane is almost pure white, while his mantle is flecked grey and white.
This image shot with the Sony 135mm f1.8 GM on a Sony A1, at ISO 100 f/4 1/250. No processing apart from cropping.