Warthog, Phacochoerus aethiopicus, single mammal by water, South Africa, August 2016. Canon EOS 7D Mk2. 100-400 mm lens at 214mm. 400 iso. 1/640th at f5.
Taken from the Lagoon Hide at Zimanga Game Reserve. Possibly the best photographic hide in the world. It would get my vote. Shot through one way glass, which was also the best I have experienced. It had no effect on colour or sharpness, unlike many I have been in.