Betsie Storm posted a roan from Makola a few weeks ago, I think I suffered from the same harsh light.
We found a nice herd with youngsters in the shade and decided to move off for a while, fatal mistake, when we returned they were in the distance in good light, a lesson learned.
Taken on 13th December 2009, Makola National Park, Northern Cape, South Africa.
EOS 1D MkIIn
28-300mm at 210mm, legs hidden so I zoomed for head contact.