Topi (Antelope)
Damaliscus lunatus jimela
Observed at Maasai Mara, Narok County, Kenya. 22 October 2016.
From Wikipedia:
Topi resemble hartebeest but have a darker coloration and lack sharply angled horns.
They have elongated heads, a distinct hump at the base of the neck, and reddish brown bodies
with dark purple patchings on their upper legs. They also have a mask-like dark coloration on the face.
Their horns are ringed and lyrate shaped. Their coats are made of short, shiny hairs.