Neil Aldridge / White rhinoceros (Ceratotherium simum) mother and calf, prepare to leave a boma - a secure enclosure - in the Okavango Delta in northern Botswana after being translocated from South Africa as part of...

Neil Aldridge / Blindfolded and tranquilised adult White rhinoceros (Ceratotherium simum) with a tracking tag lies and recovers in the Okavango Delta, northern Botswana, following a translocation operation that invol...

Neil Aldridge / Team of vets and conservation staff move a sedated White rhinoceros (Ceratotherium simum) into a comfortable resting position in a secure enclosure known as a boma during a translocation operation to...

Neil Aldridge / A young White rhinoceros (Ceratotherium simum) leaves a secure enclosure known as a boma in the Okavango Delta, northern Botswana, after being translocated from South Africa as part of efforts to rebu...

Neil Aldridge / Black rhinoceros (Diceros bicornis) stands in evening light on Chief's Island in Okavango Delta, Botswana,. This rhino was released in the Okavango Delta as part of efforts to rebuild the rhino popula...

Marion Vollborn/ BIA / Leopard (Panthera pardus) cub, Okavango Delta, Botswana

Marion Vollborn/ BIA / African Lion (Panthera leo) cubs drinking at waterhole, Okavango Delta, Botswana

Michel Roggo / Aquatic plants on the river bed of the Okavango river, Okavango Delta, Botswana, June 2014 . Photographed for The Freshwater Project

Michel Roggo / View of African fish eagle (Haliaeetus vocifer),from underwater, trying to catch a fish on the surface, Okavango Delta, Botswana, June. Photographed for The Freshwater Project

Neil Aldridge / Warthog (Phacochoerus africanus) with a Yellow-billed oxpecker (Buphagus africanus) on its back, nuzzling its mother at a waterhole, Chief's Island, Okavango Delta, Botswana.

Neil Aldridge / Leopard (Panthera pardus) male in vegetation, Chief's Island, Okavango Delta, Botswana. Vulnerable species.

Neil Aldridge / Portrait of a female Leopard (Panthera pardus) on Chief's Island, Okavango Delta, Botswana. Vulnerable species.