Black rhinoceros at night. The waterhole at Okaukuejo in the Etosha National Park in Namibia, is visited by black rhinoceros (Diceros bicornis) on a regular basis. This animal stood in the water at night for quite some time before drinking. The calm water allowed for reflections. The position of the flash, some 30 meters from the camera, helped reveal the structures of the body surface. The photo was taken in April 2016.